APT-E at London St Pancras Station.
APT-E at London St Pancras Station.
Special speed restriction marker boards were erected for APT-E's high speed runs between London and Leicester.
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| WARNING BOARD | COMMENCEMENT BOARD | TERMINATION BOARD |
Boards are 2ft square with 18in letters.
Top of board approximately 6ft above rail level.
| Code Letter | Commencement (miles/chains) |
Termination (miles/chains) |
Speed restriction (mph) |
|---|---|---|---|
| A | 11/20 | 12/60 | 110 |
| B | 18/14 | 19/31 | 115 |
| C | 19/31 | 20/72 | 105 |
| D | 24/70 | 27/34 | 120 |
| G | 27/70 | 29/16 | 100 |
| H | 29/60 | 30/40 | 105 |
| I | 34/54 | 35/30 | No restriction |
| J | 42/11 | 43/20 | 110 |
| K | 47/65 | 50/00 | 100 |
| L | 54/00 | 55/38 | 110 |
| M | 57/70 | 58/11 | 115 |
| N | 63/00 | 64/35 | 95 |
| P | 64/35 | 65/20 | 70 |
| Q | 69/74 | 70/58 | 110 |
| R | 70/58 | 72/60 | 100 |
| S | 74/55 | 75/60 | 110 |
| U | 78/00 | 78/20 | 115 |
| V | 82/00 | 82/40 | 85 |
| X | 82/40 | 83/40 | 75 |
| Y | 88/70 | 90/09 | No restriction |
| Z | 91/70 | 92/48 | No restriction |
| a | 94/12 | 95/46 | 110 |
| b | 95/46 | 95/74 | 95 |
Note: Letters O, T and W omitted; original restrictions E and F combined with D.
| Curve No |
Location (Mileage) |
Cant (mm) |
Curvature (m) |
Hand of Curve |
|---|---|---|---|---|
| 1 | 18.50 to 19.25 | 76.2 | 1460 | L |
| 2 | 19.30 to 20.27 | 87.0 | 1270 | R |
| 3 | 20.34 to 20.90 | 63.5 | 1440 | L |
| 4 | 24.80 to 25.40 | 105.6 | 1536 | R |
| 5 | 25.42 to 26.28 | 102.9 | 1440 | L |
| 6 | 26.31 to 26.86 | 105.0 | 1440 | R |
| 7 | 26.86 to 27.40 | 95.3 | 1440 | L |
| 8 | 28.03 to 28.47 | 88.9 | 1140 | R |
| 9 | 28.47 to 28.96 | 101.6 | 940 | L |
| 10 | 29.73 to 30.20 | 112.9 | 1140 | L |
| 11 | 34.58 to 35.47 | 127.0 | 1560 | R |
| 12 | 57.81 to 58.18 | 88.3 | 1513 | R |
| 13 | 74.83 to 75.79 | 60.1 | 1571 | L |
| 14 | 78.08 to 78.71 | 122.0 | 1357 | R |
| 15 | 89.10 to 90.22 | 77.2 | 1924 | R |
| 16 | 91.86 to 92.54 | 141.7 | 1297 | L |
| 17 | 95.58 to 95.92 | 151.2 | 666 | R |
| Distance | Restriction | Elapsed Time (m s) |
Speed (mph) |
|---|---|---|---|
| 0.0 | LONDON St Pancras | 0 00 | 0.0 |
| 1.0 | 2 40 | 61.7 | |
| 2.0 | 3 25 | 67.6 | |
| 3.0 | 4 05 | 75.8 | |
| 4.0 | 5 00 | 73.0 | |
| 5.0 | 5 50 | 75.3 | |
| 6.0 | 6 35 | 77.1 | |
| 7.0 | Hendon | 7 20 | 77.7 |
| 8.0 | 8 05 | 90.4 | |
| 9.0 | 8 45 | 99.2 | |
| 10.0 | 9 20 | 105.8 | |
| 11.0 | 9 50 | 111.1 | |
| 11.3 | A | 10 00 | 111.2 |
| 12.0 | 10 35 | 110.8 | |
| 13.0 | 11 00 | 115.9 | |
| 14.0 | 11 25 | 124.5 | |
| 15.0 | 11 55 | 126.2 | |
| 16.0 | 12 25 | 125.4 | |
| 17.0 | 12 55 | 125.9 | |
| 18.0 | 13 25 | 117.4 | |
| 18.2 | B | 13 30 | 114.6 |
| 19.0 | 13 55 | 106.0 | |
| 19.4 | C | 14 10 | 107.0 |
| 19.9 | St Albans | - | - |
| 20.0 | 14 30 | 107.7 | |
| 21.0 | - | 108.8 | |
| 22.0 | 15 35 | 115.2 | |
| 23.0 | 16 05 | 120.7 | |
| 24.0 | 16 35 | 126.3 | |
| 24.9 | D | 17 00 | 120.1 |
| 25.0 | 17 05 | 118.1 | |
| 26.0 | 17 35 | 122.4 | |
| 27.0 | 18 05 | 120.7 | |
| 27.9 | G | 18 30 | 100.0 |
| 28.0 | 18 35 | 96.8 | |
| 29.0 | 19 10 | 101.4 | |
| 29.8 | H | 19 40 | 106.9 |
| 30.0 | 19 50 | 105.6 | |
| 30.2 | Luton | - | - |
| 31.0 | 20 20 | 110.3 | |
| 32.0 | 20 55 | 115.7 | |
| 33.0 | - | 121.5 | |
| 34.0 | 21 55 | 126.0 | |
| 34.7 | I | 22 10 | 129.7 |
| 35.0 | - | 131.6 | |
| 36.0 | 22 50 | 136.7 | |
| 37.0 | 23 15 | 123.0 | |
| 38.0 | 23 45 | 125.1 | |
| 39.0 | 24 10 | 126.5 | |
| 40.0 | 24 40 | 125.5 | |
| 41.0 | 25 10 | 126.1 | |
| 42.0 | 25 40 | 116.2 | |
| 42.1 | J | 25 45 | 112.9 |
| 43.0 | 26 10 | 114.2 | |
| 44.0 | 26 45 | 115.3 | |
| 45.0 | 27 10 | 124.7 | |
| 46.0 | 27 40 | 127.0 | |
| 47.0 | 28 10 | 126.8 | |
| 47.8 | K | - | 106.5 |
| 48.0 | 28 40 | 102.0 | |
| 49.0 | 29 15 | 102.9 | |
| 50.0 | Bedford North | 29 50 | 103.2 |
| 51.0 | 30 25 | 109.3 | |
| 52.0 | 30 55 | 115.6 | |
| 53.0 | 31 30 | 117.9 | |
| 54.0 | L | - | 112.2 |
| 55.0 | - | 112.3 | |
| 56.0 | 33 00 | 116.1 | |
| 56.6 | Sharnbrook Summit | - | - |
| 57.0 | - | 116.6 | |
| 57.9 | M | 34 00 | 117.0 |
| 58.0 | - | 116.5 | |
| 59.0 | 34 35 | 117.7 | |
| 60.0 | 35 05 | 121.6 | |
| 61.0 | 35 35 | 125.8 | |
| 62.0 | 36 00 | 126.5 | |
| 63.0 | N | - | 101.6 |
| 64.0 | 37 10 | 88.6 | |
| 64.4 | P | - | 72.9 |
| 65.0 | - | 71.8 | |
| 65.1 | Wellingborough | - | - |
| 66.0 | 38 45 | 88.8 | |
| 67.0 | - | 102.1 | |
| 68.0 | - | 110.0 | |
| 69.0 | 40 30 | 116.9 | |
| 69.9 | Q | - | 112.4 |
| 70.0 | 41 00 | 111.5 | |
| 70.7 | R | - | 103.5 |
| 71.0 | 41 30 | 102.4 | |
| 72.0 | Kettering | 42 10 | 104.1 |
| 73.0 | 42 40 | 108.2 | |
| 74.0 | 43 15 | 111.8 | |
| 74.7 | S | 43 35 | 113.0 |
| 75.0 | 43 45 | 114.5 | |
| 76.0 | 44 20 | - | |
| 77.0 | 44 50 | 115.0 | |
| 78.0 | U | 45 20 | 112.0 |
| 78.5 | Desborough Summit | - | - |
| 79.0 | 45 55 | 116.0 | |
| 80.0 | 46 25 | 113.4 | |
| 81.0 | 46 55 | 110.0 | |
| 82.0 | V | 47 35 | 90.1 |
| 82.5 | X | 47 55 | 79.6 |
| 82.9 | Market Harborough | - | - |
| 83.0 | 48 15 | 77.1 | |
| 84.0 | 49 00 | 91.0 | |
| 85.0 | 49 40 | 105.7 | |
| 86.0 | 50 10 | 112.4 | |
| 87.0 | 50 45 | 115.4 | |
| 88.0 | 51 15 | 117.0 | |
| 88.9 | Y | - | 117.2 |
| 89.0 | 51 45 | 117.6 | |
| 90.0 | 52 20 | 121.7 | |
| 91.0 | 52 45 | 126.7 | |
| 91.9 | Z | - | 124.4 |
| 92.0 | 53 15 | 124.8 | |
| 93.0 | 53 45 | 126.4 | |
| 94.0 | 54 10 | 123.0 | |
| 94.2 | a | - | 114.4 |
| 95.0 | 54 45 | 99.1 | |
| 95.6 | b | - | 97.3 |
| 95.9 | Wigston North | - | - |
| 96.0 | 55 20 | 98.5 | |
| 97.0 | 56 00 | 96.3 | |
| 98.0 | 56 40 | 73.6 | |
| 99.0 | 58 05 | 19.1 | |
| 99.1 | LEICESTER | 58 30 | 0.0 |
Driver Ken Austin brought the train to a stand in Platform 1 at Leicester just 58 minutes and 30 seconds after leaving London St Pancras, an average speed of 101.6 mph on the severely curved 99.1 mile route.
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Details of the London - Leicester high speed trials can be found in chapter six of 'APT A Promise Unfulfilled' by Hugh Williams. |
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