| Date | Currency | Open | High | Low | Close | A.Close | Day Change | Volume |
|---|---|---|---|---|---|---|---|---|
| 20 May 1991 | GBX | 122 | 124 | 122 | 124 | 124 | +3 (+2.48%) | 236,480 |
| 17 May 1991 | GBX | 123 | 123 | 120 | 121 | 121 | +1 (+0.83%) | 53,238 |
| 16 May 1991 | GBX | 121 | 123 | 120 | 120 | 120 | -3 (-2.44%) | 299,524 |
| 15 May 1991 | GBX | 120 | 124 | 119 | 123 | 123 | -1 (-0.81%) | 333,401 |
| 14 May 1991 | GBX | 123 | 125 | 123 | 124 | 124 | 0.0 (0.0%) | 329,208 |
| 13 May 1991 | GBX | 125 | 127 | 124 | 124 | 124 | -5 (-3.88%) | 357,013 |
| 10 May 1991 | GBX | 128 | 130 | 126 | 129 | 129 | +1 (+0.78%) | 692,709 |
| 9 May 1991 | GBX | 129.5 | 131 | 124 | 128 | 128 | -10 (-7.25%) | 2,372,854 |
| 8 May 1991 | GBX | 141 | 141 | 136.5 | 138 | 138 | -4 (-2.82%) | 455,158 |
| 7 May 1991 | GBX | 139 | 142 | 139 | 142 | 142 | +3 (+2.16%) | 18,843 |
| 3 May 1991 | GBX | 142 | 142 | 139 | 139 | 139 | -2 (-1.42%) | 6,798 |
| 2 May 1991 | GBX | 143 | 144 | 139 | 141 | 141 | -3 (-2.08%) | 2,099,995 |
| 1 May 1991 | GBX | 145 | 145 | 140 | 144 | 144 | -2.5 (-1.71%) | 427,221 |
| 30 Apr 1991 | GBX | 147.5 | 148 | 145 | 146.5 | 146.5 | +0.5 (+0.34%) | 47,617 |
| 29 Apr 1991 | GBX | 144 | 148 | 144 | 146 | 146 | +1 (+0.69%) | 373,756 |
| 26 Apr 1991 | GBX | 147 | 147 | 144 | 145 | 145 | 0.0 (0.0%) | 144,599 |
| 25 Apr 1991 | GBX | 145.375 | 147 | 144 | 145 | 145 | -1.5 (-1.02%) | 353,468 |
| 24 Apr 1991 | GBX | 145.5 | 146.5 | 145.5 | 146.5 | 146.5 | +1.5 (+1.03%) | 61,047 |
| 23 Apr 1991 | GBX | 147.5 | 147.5 | 145 | 145 | 145 | -2.5 (-1.69%) | 63,481 |
| 22 Apr 1991 | GBX | 146 | 147.5 | 146 | 147.5 | 147.5 | -0.5 (-0.34%) | 164,418 |
| 19 Apr 1991 | GBX | 149 | 150 | 148 | 148 | 148 | 0.0 (0.0%) | 276,813 |
| 18 Apr 1991 | GBX | 149 | 152 | 148 | 148 | 148 | -1.5 (-1.00%) | 41,404 |
| 17 Apr 1991 | GBX | 146 | 151 | 145.5 | 149.5 | 149.5 | +1.5 (+1.01%) | 1,930,381 |
| 16 Apr 1991 | GBX | 146 | 148 | 145.875 | 148 | 148 | +4 (+2.78%) | 426,683 |
| 15 Apr 1991 | GBX | 145 | 147 | 144 | 144 | 144 | -1 (-0.69%) | 619,539 |
| 12 Apr 1991 | GBX | 147 | 147 | 144.5 | 145 | 145 | -2 (-1.36%) | 527,449 |
| 11 Apr 1991 | GBX | 146 | 147 | 143 | 147 | 147 | +4 (+2.80%) | 531,870 |
| 10 Apr 1991 | GBX | 147 | 148 | 143 | 143 | 143 | -3.875 (-2.64%) | 7,623,759 |
| 9 Apr 1991 | GBX | 148 | 148 | 146 | 146.875 | 146.875 | -1.125 (-0.76%) | 367,692 |
| 8 Apr 1991 | GBX | 148 | 149 | 147 | 148 | 148 | -2 (-1.33%) | 182,000 |
