English: Govia Thameslink's class 387 Electrostar dual voltage electric multiple unit (EMU) number 387127 comprised of coaches 421127, 422127, 423127 and 424127 with Thameslink branding works 1E71 from Sevenoaks to Bedford via Catford (click here for a map of the route) on 5 January 2016. Since the recent timetable change the use of class 387 EMUs has been expanded to temporarily cover this Thameslink route replacing the class 319 EMUs that were transferred to Northern Rail. It is said that use of Class 387s will continue until the delayed class 700 EMU contract is delivered at which point the class 387 EMUs will be transferred to First Great Western. 387127 was built by Bombardier Transportation (previously ADtranz) being assembled at Litchurch Lane Works, Derby and entered service on 23 April 2015.

According to Realtime Trains the route and timings were; Sevenoaks [SEV] 4.............1030.........................1029 3/4...................RT Otford Junction[XOT]........1035.........................1036............................1L Swanley [SAY] 1...................1047 1/2/1048 1/2...1049 1/2/1049 3/4....1L St Mary Cray Junction.......1054 1/2...................1055 1/2.....................1L Bickley Junction[XLY]........1055 1/2...................1056..........................RT Bromley South [BMS] 1......1059/1100................1058 1/2/1059 3/4..RT Shortlands [SRT].................1102..........................1101..............................1E Shortlands Junction...........1103 1/2....................1101 3/4......................1E Bellingham [BGM]...............1108 1/2/1109...........1108 1/2/1109 1/4.....RT Catford [CTF] 1.....................1111/1112....................1111/1112......................RT Nunhead [NHD] 1................1116 1/2.....................1116.............................RT Peckham Rye [PMR] 3.......1119/1120..................1118/1119 3/4.............RT Crofton Road Junction......1122..........................1122 3/4....................RT Denmark Hill [DMK] 3........1123/1124.................1123/1124...................RT Elephant & Castle 3............1130/1133.................1129/1132...................1E London Blackfriars 2..........1136/1138.................1138/1140..................2L Farringdon [ZFD] 4.............1143/1144..................1144/1145....................1L St Pancras International....1147 1/2/1148 1/2.....1148/1149...................RT Dock JunctionNorth...........1150..........................1150............................RT Kentish Town [KTN] 2........1151 1/2.....................1152 1/2......................1L Kentish Town Junction......1153...........................1152 1/2.....................RT Carlton Road Junction......1154 1/2....................1153 1/2.....................RT West Hampstead Sth Jn...1156..........................1155.............................1E W. H'stead Thameslink......1156 1/2....................1155 1/2.....................RT W. Hampstead Nth Jn........1156 1/2....................1155 1/2.....................RT Cricklewood South Jn.......1157...........................1155 3/4.....................1E Cricklewood [CRI] 4...........1157 1/2....................1156 1/4.....................RT Cricklewood Curve Jn.......1157 1/2....................1156 1/4.....................RT Brent Curve Junction.........1158...........................1156 3/4.....................1E Hendon [HEN] 4..................1158 1/2....................1157 1/2......................RT Silkstream Junction............1159..........................1157 3/4......................1E Mill Hill Broadway 4...........1200.........................1158 3/4.....................1E Elstree&Borehamwood.....1202.........................1200 1/2.....................1E Radlett Junction..................1203 1/2...................1202 1/2.....................1E Radlett [RDT] 2....................1204.........................1203 1/2....................RT R. Redland Roadstone.......1205.........................1204 1/4....................RT St Albans [SAC] 2................1208 1/2/1209 1/2..1207 3/4/1209.........RT Harpenden Junction..........1213 1/2....................1213............................RT Harpenden [HPD] 2............1214 1/2/1215...........1213 3/4/1214 3/4....RT Luton Airport Parkway 2...1220/1221................1219 1/2/1220 3/4...RT Luton North Junction.........1225.........................1224 1/2....................RT Leagrave [LEA] 2.................1227 1/2/1228.........1226 3/4/1227 3/4..RT Leagrave Junction..............1228 1/2...................1228 1/4....................RT Harlington [HLN] 2..............1232 1/2/1233.........1232 1/4/1232 3/4...RT Flitwick [FLT] 2....................1236 1/2/1237.........1236/1236 3/4.........RT Flitwick Junction.................1238..........................1237 1/2.....................RT Bedford South Junction....1245..........................1244...........................RT

Bedford [BDM] 1..................1249..........................1246 1/4....................2E