| Date | Currency | Open | High | Low | Close | A.Close | Day Change | Volume |
|---|---|---|---|---|---|---|---|---|
| 28 May 1991 | GBX | 491 | 497 | 491 | 496 | 146.3199 | +1 (+0.20%) | 53,905 |
| 24 May 1991 | GBX | 490 | 495 | 490 | 495 | 146.0249 | +20 (+4.21%) | 56,460 |
| 23 May 1991 | GBX | 477.75 | 477.75 | 475 | 475 | 140.1249 | -3 (-0.63%) | 12,160 |
| 22 May 1991 | GBX | 478 | 478 | 478 | 478 | 141.0099 | 0.0 (0.0%) | 3,368 |
| 17 May 1991 | GBX | 480 | 480 | 478 | 478 | 141.0099 | -7 (-1.44%) | 6,250 |
| 16 May 1991 | GBX | 479 | 485 | 479 | 485 | 143.0749 | +5 (+1.04%) | 32,562 |
| 15 May 1991 | GBX | 480 | 480 | 480 | 480 | 141.5999 | 0.0 (0.0%) | 130,538 |
| 14 May 1991 | GBX | 480 | 480 | 480 | 480 | 141.5999 | -8 (-1.64%) | 2,324 |
| 13 May 1991 | GBX | 488.5 | 488.5 | 488 | 488 | 143.9599 | -2 (-0.41%) | 43,100 |
| 10 May 1991 | GBX | 485 | 490 | 485 | 490 | 144.5499 | +5 (+1.03%) | 30,105 |
| 9 May 1991 | GBX | 488 | 488 | 485 | 485 | 143.0749 | -3 (-0.61%) | 7,520 |
| 8 May 1991 | GBX | 495 | 495 | 488 | 488 | 143.9599 | -5 (-1.01%) | 1,975 |
| 7 May 1991 | GBX | 500 | 500 | 493 | 493 | 145.4349 | -2 (-0.40%) | 322,280 |
| 3 May 1991 | GBX | 493 | 495 | 493 | 495 | 146.0249 | +1 (+0.20%) | 2,650 |
| 2 May 1991 | GBX | 494 | 494 | 494 | 494 | 145.7299 | +1 (+0.20%) | 825 |
| 1 May 1991 | GBX | 500 | 500 | 493 | 493 | 145.4349 | -1 (-0.20%) | 5,344 |
| 30 Apr 1991 | GBX | 494 | 500 | 493 | 494 | 145.7299 | +1 (+0.20%) | 6,958 |
| 29 Apr 1991 | GBX | 493 | 497 | 493 | 493 | 145.4349 | -3 (-0.60%) | 11,468 |
| 26 Apr 1991 | GBX | 502 | 502 | 495 | 496 | 146.3199 | -2 (-0.40%) | 87,395 |
| 25 Apr 1991 | GBX | 498 | 498 | 498 | 498 | 146.9099 | 0.0 (0.0%) | 16,540 |
| 24 Apr 1991 | GBX | 498 | 498 | 498 | 498 | 146.9099 | 0.0 (0.0%) | 1,300 |
| 23 Apr 1991 | GBX | 502 | 502 | 498 | 498 | 146.9099 | -2 (-0.40%) | 4,114 |
| 22 Apr 1991 | GBX | 505 | 505 | 500 | 500 | 147.4999 | 0.0 (0.0%) | 11,629 |
| 19 Apr 1991 | GBX | 500 | 500 | 500 | 500 | 147.4999 | 0.0 (0.0%) | 2,760 |
| 18 Apr 1991 | GBX | 500 | 500 | 500 | 500 | 147.4999 | -3 (-0.60%) | 2,390 |
| 17 Apr 1991 | GBX | 498 | 503 | 498 | 503 | 148.3849 | +3 (+0.60%) | 13,672 |
| 16 Apr 1991 | GBX | 500 | 500 | 498 | 500 | 147.4999 | -5 (-0.99%) | 9,913 |
| 15 Apr 1991 | GBX | 503 | 505 | 500 | 505 | 148.9749 | +8 (+1.61%) | 23,168 |
| 12 Apr 1991 | GBX | 497 | 500 | 497 | 497 | 146.6149 | 0.0 (0.0%) | 12,818 |
| 11 Apr 1991 | GBX | 497 | 503 | 497 | 497 | 146.6149 | 0.0 (0.0%) | 30,558 |
