| Chiffre d'affaires | £22 377 149 | £19 394 184 | £29 196 735 | £21 845 866 | £28 956 713 | £24 223 562 | £32 344 399 | — |
| Bénéfice / (perte) | £167 794 | £108 001 | £164 782 | £20 724 | £37 970 | £-223 506 | £77 537 | £30 030 |
| Marge brute | £2 805 602 | £2 850 138 | £3 598 628 | £3 340 099 | £3 727 369 | £1 229 856 | £4 185 952 | — |
| Bénéfice d'exploitation | £786 481 | £581 243 | £929 197 | £125 056 | £288 225 | £-1 664 867 | £744 984 | — |
| Autres revenus | £30 293 | £24 769 | £22 386 | £25 935 | £25 149 | £22 908 | £925 | £892 |
| Total des actifs | — | £3 203 366 | £64 440 | £-10 000 | £4 170 844 | £2 715 664 | £3 281 946 | £3 512 419 |
| Net Assets Liabilities | — | £2 912 205 | £3 203 366 | £3 821 535 | £3 926 466 | £4 170 844 | £2 715 664 | £3 281 946 |
| Equity | — | £3 203 366 | £3 821 535 | £3 926 466 | £4 170 844 | £2 715 664 | £3 281 946 | £3 512 419 |
| Current Assets | — | £6 254 575 | £5 682 669 | £7 153 488 | £5 845 391 | £7 785 108 | £9 541 526 | £9 626 417 |
| Net Current Assets Liabilities | — | £1 414 706 | £1 681 502 | £1 735 199 | £1 843 121 | £1 888 489 | £3 183 093 | £3 388 180 |
| Total Assets Less Current Liabilities | — | £3 628 248 | £3 857 860 | £4 388 796 | £4 409 337 | £4 911 023 | £4 706 672 | £4 811 772 |
| Cash Bank On Hand | — | £1 318 977 | £830 377 | £1 773 173 | £189 529 | £795 109 | £1 925 300 | £1 198 750 |
| Debtors | — | £4 788 358 | £4 705 052 | £5 233 075 | £5 508 622 | £6 895 009 | £7 571 226 | £8 427 667 |
| Other Debtors | — | £148 377 | £81 111 | £62 044 | £26 817 | £168 103 | £65 721 | £31 735 |
| Creditors | — | £716 043 | £654 494 | £567 261 | £482 871 | £740 179 | £1 621 289 | £1 243 285 |
| Trade Creditors Trade Payables | — | £818 512 | £444 262 | £628 575 | £1 738 234 | £2 269 617 | £1 240 165 | £1 498 878 |
| Other Creditors | — | £689 | £832 | £5 142 | £30 786 | £30 786 | £81 949 | £84 633 |
| Investments Fixed Assets | — | £1 042 000 | £1 042 000 | £1 525 750 | £1 525 750 | £1 525 750 | £72 655 | — |
| Issue Equity Instruments | — | — | £64 440 | £63 755 | — | — | — | — |
| Average Number Employees During Period | 77 | 62 | 77 | 83 | 87 | 94 | 90 | 86 |
| Frais administratifs | £2 038 975 | £2 312 308 | £2 707 504 | £3 244 722 | £3 495 333 | £3 529 798 | £3 569 626 | £3 674 071 |
| Accrued Liabilities Deferred Income | — | £2 696 450 | £2 395 160 | £4 144 191 | £1 950 307 | £3 108 327 | £4 187 975 | £3 838 553 |
| Accumulated Depreciation Impairment Property Plant Equipment | — | £664 222 | £692 824 | £647 211 | £656 273 | £700 461 | £729 320 | £731 588 |
| Additions Other Than Through Business Combinations Property Plant Equipment | — | £150 226 | £172 849 | £104 494 | £623 874 | £54 779 | £118 031 | £7 345 |
| Amounts Owed By Associates Joint Ventures Participating Interests | — | — | £208 400 | £305 150 | £305 150 | £305 150 | £10 536 | £10 536 |
| Amounts Owed By Group Undertakings | — | — | £510 226 | £1 177 226 | £1 286 224 | £1 359 224 | £1 755 576 | £1 755 611 |
| Amounts Recoverable On Contracts | — | £147 240 | £147 240 | £147 240 | £147 240 | £94 990 | £45 000 | £45 000 |
| Audit Fees Expenses | £8 450 | £8 300 | £8 550 | £8 500 | £10 100 | £10 150 | £11 500 | £12 676 |
| Bank Borrowings | — | £717 984 | £652 098 | £589 909 | £520 646 | £766 605 | £1 884 996 | £1 589 991 |
| Bank Borrowings Overdrafts | — | £653 984 | £586 212 | £527 721 | £451 382 | £692 839 | £1 584 722 | £1 203 377 |
| Banking Arrangements Classified As Cash Cash Equivalents | — | — | — | £-186 712 | — | — | — | £0 |
| Bank Overdrafts | — | £775 463 | £725 731 | £186 712 | — | — | — | £462 682 |
| Carrying Amount Under Cost Model Revalued Assets Property Plant Equipment | — | £315 884 | £291 517 | £261 468 | £189 022 | £217 042 | £176 657 | £205 297 |
| Cash Cash Equivalents Cash Flow Value | — | — | — | £1 586 461 | £189 529 | £795 109 | £1 925 300 | £1 198 750 |
| Cash Receipts From Sales Interests In Associates | — | — | £483 750 | — | £0 | — | — | — |
| Company Contributions To Defined Benefit Plans Directors | £21 072 | £23 823 | £32 496 | £33 272 | £36 541 | £36 090 | £41 691 | — |
| Comprehensive Income Expense | — | — | — | — | — | £-1 455 180 | £566 282 | £230 473 |
| Corporation Tax Payable | — | £167 794 | £108 001 | £164 815 | £22 735 | £37 976 | — | £0 |
| Corporation Tax Recoverable | — | — | — | — | — | £0 | £210 958 | £146 047 |
| Cost Sales | £19 571 547 | £16 544 046 | £25 598 107 | £18 505 767 | £25 229 344 | £22 993 706 | £28 158 447 | £26 263 821 |
| Current Tax For Period | — | £167 794 | £112 700 | £164 815 | £22 735 | £37 970 | £-223 506 | £77 537 |
| Depreciation Expense Property Plant Equipment | — | £105 295 | £97 172 | — | — | £58 886 | £68 432 | — |
| Depreciation Impairment Expense Property Plant Equipment | — | — | £124 025 | £95 468 | £97 142 | £81 379 | £84 782 | £60 636 |
| Director Remuneration | — | — | — | £628 411 | £623 861 | £597 401 | £690 414 | £728 433 |
| Director Remuneration Benefits Including Payments To Third Parties | — | — | £430 506 | £661 683 | £660 402 | £633 491 | £732 105 | £801 271 |
| Dividends Paid | — | £175 800 | £199 133 | £199 133 | — | — | — | — |
| Dividends Paid Classified As Financing Activities | £-172 800 | £-175 800 | £-199 133 | — | — | — | — | — |
| Dividends Paid On Shares Interim | — | — | £199 133 | — | — | — | — | — |
| Finance Lease Liabilities Present Value Total | — | £62 059 | £68 282 | £39 540 | £31 489 | £47 340 | £36 567 | £39 908 |
| Finance Lease Payments Owing Minimum Gross | — | £238 078 | £179 711 | £134 661 | £85 649 | £119 949 | £84 737 | £96 781 |
| Fixed Assets | — | £2 213 542 | £2 176 358 | £2 653 597 | £2 566 216 | £3 022 534 | £1 523 579 | — |
| Further Item Cash Flow From Used In Financing Activities Component Net Cash Flows From Used In Financing Activities | — | £-413 484 | £65 886 | £62 189 | £69 263 | £73 766 | £111 609 | £295 005 |
| Further Item Cash Flow From Used In Investing Activities Component Net Cash Flows From Used In Investing Activities | — | — | — | — | — | — | £348 209 | £-89 196 |
| Further Item Interest Expense Component Total Interest Expense | — | — | — | — | — | — | £0 | £2 009 |
| Further Item Proceeds From Sales Other Long-term Assets Classified As Investing Activities Component Corresponding Total | — | — | — | £-10 000 | — | — | — | — |
| Further Item Tax Increase Decrease Component Adjusting Items | — | £8 065 | £-33 | £-33 | — | — | £0 | £-1 809 |
| Future Minimum Lease Payments Under Non-cancellable Operating Leases | — | — | — | £49 521 | £19 226 | £86 508 | £99 455 | £117 822 |
| Gain Loss In Cash Flows From Change In Creditors Trade Other Payables | — | — | £-1 881 821 | £1 053 342 | £-1 856 157 | £-297 721 | £215 239 | £297 652 |
| Gain Loss In Cash Flows From Change In Debtors Trade Other Receivables | — | — | £500 511 | £275 547 | £1 334 137 | £415 269 | £876 352 | £1 012 732 |
| Gain Loss On Disposals Property Plant Equipment | £-13 485 | £-15 591 | £10 269 | £-15 693 | £-7 445 | £-7 414 | £10 154 | — |
| Gain Loss On Revaluation Property Plant Equipment Before Tax In Other Comprehensive Income | — | — | — | — | — | £0 | £-40 000 | £0 |
| Government Grant Income | £13 103 | £43 413 | £38 073 | £28 303 | £51 189 | £629 785 | £128 658 | — |
| Gross Profit Loss | £2 805 602 | £2 850 138 | £3 598 628 | £3 340 099 | £3 727 369 | £1 229 856 | £4 185 952 | — |
| Impairment Reversal Other Non-financial Assets | — | — | — | — | — | — | £0 | £-230 579 |
| Income Taxes Paid Refund Classified As Operating Activities | £-130 409 | £-167 794 | £-107 968 | £-162 804 | £-22 729 | £-25 428 | £-12 626 | £176 222 |
| Increase Decrease In Cash Cash Equivalents Before Foreign Exchange Differences Changes In Consolidation | £-305 088 | £438 868 | £-1 481 815 | £1 396 934 | £-605 580 | £-1 130 191 | £726 550 | £1 395 994 |
| Increase Decrease In Current Tax From Adjustment For Prior Periods | — | £-4 699 | £-4 699 | £-2 011 | £-2 011 | — | — | — |
| Increase From Depreciation Charge For Year Property Plant Equipment | — | £127 410 | £124 025 | £95 468 | £97 142 | £81 379 | £84 782 | £60 636 |
| Interest Expense On Bank Overdrafts Bank Loans Similar Borrowings | £15 548 | £21 622 | £28 174 | £19 211 | £27 187 | £33 343 | £56 836 | — |
| Interest Expense On Obligations Under Finance Leases Hire Purchase Contracts | £7 970 | £9 428 | £5 765 | £6 125 | £3 839 | £3 384 | £3 245 | — |
| Interest Income On Bank Deposits | £13 621 | £7 291 | £1 161 | £1 523 | £699 | £175 | £82 | £892 |
| Interest Income On Financial Assets That Are Not Fair Value Through Profit Or Loss | £13 621 | £7 291 | £1 161 | £1 523 | £699 | £175 | £82 | £892 |
| Interest Paid Classified As Operating Activities | — | — | — | — | — | £-36 727 | £-62 090 | £-84 338 |
| Interest Payable Similar Charges Finance Costs | £23 518 | £31 050 | £33 939 | £25 336 | £31 026 | £36 727 | £62 090 | £84 338 |
| Interest Received Classified As Investing Activities | £-30 293 | £-24 769 | £-22 386 | £-25 935 | £-25 149 | £-22 908 | £-925 | £-892 |
| Investments In Associates | — | — | — | £1 525 750 | £1 525 750 | £1 525 750 | £72 655 | — |
| Key Management Personnel Compensation Total | — | — | £513 581 | £715 892 | £728 815 | £680 788 | £732 104 | £801 504 |
| Loss Gain From Write-downs Reversals Inventories | — | — | — | — | — | — | £0 | £-230 579 |
| Net Cash Flows From Used In Financing Activities | £-331 287 | £300 053 | £241 932 | £118 275 | £-161 989 | — | — | — |
| Net Cash Flows From Used In Investing Activities | £205 057 | £81 048 | £558 609 | £-2 153 | £417 486 | — | — | — |
| Net Cash Flows From Used In Operating Activities | £-178 858 | £57 767 | £-2 282 356 | £1 280 812 | £-861 077 | £1 037 832 | — | — |
| Net Cash Generated From Operations | £-332 785 | £-141 077 | £-2 424 263 | £1 092 672 | £-914 832 | £975 677 | £444 353 | — |
| Net Finance Income Costs | £30 293 | £24 769 | £22 386 | £25 935 | £25 149 | £22 908 | £925 | £892 |
| Net Interest Paid Received Classified As Operating Activities | £-23 518 | £-31 050 | £-33 939 | £-25 336 | £-31 026 | £-36 727 | — | — |
| Operating Profit Loss | £786 481 | £581 243 | £929 197 | £125 056 | £288 225 | £-1 664 867 | £744 984 | — |
| Other Disposals Decrease In Depreciation Impairment Property Plant Equipment | — | £79 205 | £95 422 | £141 083 | £88 080 | £37 155 | £55 923 | £58 368 |
| Other Disposals Property Plant Equipment | — | £139 203 | £150 758 | £237 489 | £158 494 | £56 396 | £76 504 | £103 980 |
| Other Interest Income | — | — | £21 225 | £24 412 | £24 450 | £22 733 | £843 | £0 |
| Other Interest Receivable Similar Income Finance Income | £30 293 | £24 769 | £22 386 | £25 935 | £25 149 | £22 908 | £925 | £892 |
| Other Operating Income Format1 | £19 854 | £43 413 | £38 073 | £29 679 | £56 189 | £635 075 | £128 658 | £36 753 |
| Other Provisions Balance Sheet Subtotal | — | — | — | — | — | £0 | £369 719 | £286 541 |
| Other Taxation Social Security Payable | — | £140 942 | £149 866 | £131 545 | £167 570 | £303 538 | £499 900 | £372 686 |
| Payments Finance Lease Liabilities Classified As Financing Activities | £90 603 | £-58 367 | £-45 050 | £-49 012 | £-83 970 | — | £-88 703 | £-66 145 |
| Pension Other Post-employment Benefit Costs Other Pension Costs | £99 439 | £105 309 | £117 521 | £130 783 | £138 385 | £147 586 | £163 783 | £198 266 |
| Percentage Class Share Held In Associate | — | £1 | £1 | £1 | £1 | £1 | £1 | — |
| Prepayments Accrued Income | — | £4 833 | £16 177 | £20 286 | £39 369 | £54 233 | £50 322 | £63 177 |
| Proceeds From Issuing Shares | — | — | £-64 440 | — | — | — | — | — |
| Proceeds From Sales Or Maturity Financial Assets Other Than Trading Investments | — | — | £-10 000 | — | — | — | — | — |
| Proceeds From Sales Property Plant Equipment | £-58 804 | — | £-65 605 | £-80 713 | £-62 969 | £-11 827 | £-30 735 | £-33 651 |
| Proceeds From Sales Property Plant Equipment Intangible Assets Classified As Investing Activities | — | — | — | £80 714 | — | — | — | — |
| Profit Loss On Ordinary Activities Before Tax | £793 256 | £574 962 | £917 644 | £125 655 | £282 348 | £-1 678 686 | £683 819 | £260 503 |
| Property Plant Equipment | — | £1 171 542 | £1 134 358 | £1 127 847 | £1 040 466 | £1 496 784 | £1 450 924 | £1 423 592 |
| Property Plant Equipment Gross Cost | — | £1 798 580 | £1 820 671 | £1 687 677 | £2 153 057 | £2 151 385 | £2 152 912 | £2 056 278 |
| Purchase Property Plant Equipment | £-294 154 | £-150 226 | £-172 849 | £-104 494 | £-505 604 | £-2 146 | £-17 284 | £-7 345 |
| Social Security Costs | £272 780 | £272 345 | £324 756 | £365 125 | £379 934 | £372 230 | £422 713 | — |
| Staff Costs Employee Benefits Expense | £3 218 220 | £3 172 727 | £3 538 389 | £3 994 849 | £4 364 122 | £4 071 941 | £4 739 079 | £5 027 727 |
| Tax Decrease From Utilisation Tax Losses | — | — | — | — | — | £0 | £36 486 | £26 789 |
| Tax Expense Credit Applicable Tax Rate | — | — | — | £174 352 | £23 874 | £53 646 | £-318 950 | £129 926 |
| Tax Increase Decrease Arising From Group Relief Tax Reconciliation | — | — | — | £-730 | £-586 | £0 | — | — |
| Tax Increase Decrease From Effect Capital Allowances Depreciation | — | £-2 292 | £-9 537 | £-409 | £-15 090 | £7 937 | £-14 094 | £7 323 |
| Tax Increase Decrease From Effect Expenses Not Deductible In Determining Taxable Profit Or Loss | £1 078 | — | — | — | — | — | — | — |
| Tax Increase Decrease From Effect Unrelieved Tax Losses Carried Forward | — | — | — | — | £0 | £87 507 | £0 | — |
| Tax Tax Credit On Profit Or Loss On Ordinary Activities | £167 794 | £108 001 | £164 782 | £20 724 | £37 970 | £-223 506 | £77 537 | £30 030 |
| Total Borrowings | — | £653 984 | £586 212 | £527 721 | £451 382 | £692 839 | £1 584 722 | £1 203 377 |
| Total Current Tax Expense Credit | £167 794 | £108 001 | £164 782 | £20 724 | £37 970 | — | — | — |
| Total Increase Decrease From Revaluations Property Plant Equipment | — | — | — | — | — | — | £-40 000 | — |
| Total Increase Decrease In Provisions | — | — | — | — | — | £-369 719 | £83 178 | £211 089 |
| Total Operating Lease Payments | £35 024 | £32 948 | £38 232 | £37 962 | £36 016 | £37 975 | £50 624 | — |
| Trade Debtors Trade Receivables | — | £1 945 067 | £592 493 | £872 018 | £903 652 | £781 308 | £453 279 | £594 206 |
| Turnover Revenue | £22 377 149 | £19 394 184 | £29 196 735 | £21 845 866 | £28 956 713 | £24 223 562 | £32 344 399 | — |
| Voting Power In Associate If Different From Ownership Interest Percent | — | — | — | £1 | £0 | £0 | £0 | — |
| Wages Salaries | £2 846 001 | £2 795 073 | £3 096 112 | £3 498 941 | £3 845 803 | £3 552 125 | £4 152 583 | £4 371 504 |
