| British Rail Class 204 | |
|---|---|
 204004 atEastleigh in 1986 | |
| In service | 1957–1987 |
| Replaced | Steam locomotives and carriages |
| Scrapped | 1987 |
| Number built | 8 units (3 rebuilt fromClass 205) |
| Number preserved | 1 driving trailer |
| Number scrapped | 7 complete units |
| Fleet numbers | 1401-1404 204001-004 |
| Operators | British Railways |
| Lines served | Southern Region |
| Specifications | |
| Prime mover(s) | English Electric 4SRKT Mark II |
| Power output | 600 shp (450 kW) at 850rpm |
| Track gauge | 4 ft 8+1⁄2 in (1,435 mm) |
TheBritish RailClass 204 designation has been used twice for two similar types ofdiesel-electric multiple units.
The original units, numbered in the range 1119-1122, were two-car versions of theClass 205 '3H' units, and were classified as2H under the old system.
In 1979, BR decided to augment the two-car units to three-car formation. Three of the four units were reformed with the addition of centre trailers taken from 3H (Class 205) units, and thus were themselves reclassified as Class 205.
The fourth 2H unit, and the three former 3H units which had given up their trailers, were augmented by reusing the ex-2EPB driving trailers from redundantClass 206 units. The Class 204 designation was re-applied to these four newly formed units (which were also given the classification3T under the old system). They were renumbered into the range 1401-1404. In 1986, the units were renumbered to 204001-004 to conform with theTOPS numbering system.
Power car (one per set)
| Key: | Reclassified | Reformed | Scrapped |
|---|
Original Class 204 (2H) Units
| Unit Number | DMBSO | DTCsoL | Disbanded[1] | Status |
|---|---|---|---|---|
| 1119 | 60118 | 60818 | 3/1980 | Reclassified as3H (unit 1119) with addition of TSO 60653 |
| 1120 | 60119 | 60819 | 3/1980 | Reclassified as3H (unit 1120) with addition of TSO 60652 |
| 1121 | 60120 | 60820 | 5/1974 | Reclassified as3H (unit 1108) with addition of TSO 60657 |
| 1122 | 60121 | 60821 | 2/1980 | Converted to 3T unit 1402 with addition of DTSso 77508 |
Reformed Class 204 (3T) Units
| Unit Number | DMBSO | DTSso | DTCsoL | Withdrawn[1] | Status | ||
|---|---|---|---|---|---|---|---|
| New | Old | Original | |||||
| 204001 | 1401 | 1108 * | 60107 | 77500 | 60807 | 8/1987 | Scrapped |
| 204002 | 1402 | 1122 | 60121 | 77508 | 60821 | 11/1987 | Scrapped |
| 204003 | 1403 | 1103 * | 60102 | 77507 | 60802 | 9/1987 | Scrapped |
| 204004 | 1404 | 1104 * | 60103 | 77503 | 60803 | 8/1987 | Scrapped |
* ex-Class 205
Of the original 2H units, a single driving trailer has been preserved.
None of the reformed 3T units are preserved.