File:66769 Mountfield to Doncaster Down Decoy 4E19 empty gypsum (16783269171).jpg

GB Railfreight's class 66/7 number 66769. Here it is photographed hauling empty gypsum containers mounted on flat wagons from Mountfield Sidings (GBRf) East Sussex to Doncaster Down Decoy (4E19) on 11 March 2015. To comply with gas emission regulations limestone (CaCO3) delivered to the power station (by other trains) is used to remove sulfur dioxide (SO2) from the flue gasses, by converting it into gypsum (CaSO4·2H2O). The waste product (gypsum) is then delivered to British Gypsum's Robertsbridge Works by train where it is used to manufacture plaster and plasterboard.

According to Realtime Trains the route and timings were; Mountfield Sidings [XMX]....1130..........................1127..............................3E Mountfield Tunnel.................1132..........................1129.............................3E Robertsbridge [RBR].............1134 1/2....................1134 1/2......................RT Wadhurst [WAD]....................1147...........................1144 1/2.......................2E Tunbridge Wells [TBW] 1.....1156/1158.................1205 3/4/1208 1/2..10L Tonbridge [TON] UF.............1215..........................1218 1/4.......................3L Sevenoaks [SEV] 1.................1225.........................1229............................4L Chelsfield [CLD].....................1231 1/2....................1234 1/2......................3L Orpington [ORP] 2.................1233.........................1237 1/4......................4L Petts Wood Junction............1234 1/2...................1241 1/2.......................7L Bickley Junction[XLY]..........1252.........................1242..........................10E Bromley South [BMS]...........1257.........................1244..........................13E Shortlands [SRT]....................1300.........................1245..........................14E Shortlands Junction..............1301..........................1245 1/4....................15E Bellingham [BGM].................1304 1/2...................1247 1/4....................17E Nunhead [NHD] 1...................1308.........................1253 3/4...................14E Peckham Rye [PMR] 3..........1309 1/2...................1255 1/2....................14E Crofton Road Junction.........1310 1/2....................1304 3/4.....................5E Denmark Hill [DMK] 1............1311 1/2.....................1307.............................4E Voltaire Road Junction........1317...........................1313..............................4E Clapham Junction [CLJ] 5...1330 1/2...................1330 3/4....................RT Wandsworth Town 2............1332 1/2...................1334 1/4......................2L Putney [PUT] 4.......................1335.........................1338 1/4......................3L Barnes [BNS] 4.......................1337 1/2...................1342 1/4......................4L Barnes Bridge [BNI] 2...........1339 1/2...................1344 3/4.....................5L Chiswick [CHK] 2...................1342.........................1346 1/4......................4L New Kew Junction................1344 1/2...................1349............................4L Kew East Junction................1347 1/2...................1350............................2L Acton Central [ACC].............1355.........................1355 1/2.....................RT Acton Wells Junction...........1357 1/2...................1358 1/2.......................1L Willesden Junction 4............1359 1/2/1401 1/2...1401 1/4/1401 1/4......RT Kensal Green Junction........1403 1/2...................1403...........................RT Brondesbury Park [BSP] 1....1407..........................1405.............................1E West Hampstead 2...............1409 1/2...................1407 1/2......................2E Hampstead Heath 2.............1413...........................1411..............................2E Gospel Oak [GPO].................1415..........................1413...............................1E Alexandra Palace [AAP] 3...1443 1/2...................1440 3/4.....................2E New Southgate [NSG] 4......1446.........................1445.............................1E Oakleigh Park [OKL] 4..........1450.........................1449...........................RT New Barnet [NBA] 4..............1451 1/2....................1450 1/2.....................RT Hadley Wood [HDW] 4.........1454.........................1453 1/2.....................RT Potters Bar [PBR] 4................1458.........................1459.............................1L Brookmans Park [BPK] 4......1501..........................1502 1/4.......................1L Welham Green [WMG] 2......1503.........................1504 3/4......................1L Hatfield [HAT] 3.....................1507.........................1508 1/2.......................1L Welwyn Garden City 3.........1511 1/2.....................1511 1/2.......................RT Digswell Junction..................1513 1/2/1525..........NoRep/1519...............6E Welwyn North [WLW] 2........1526 1/2...................1520 1/2......................6E Woolmer Green Junction....1529.........................1522 3/4.....................6E Knebworth [KBW] 4...............1530.........................1524 1/4......................5E Stevenage [SVG] 4................1532 1/2...................1526 1/2......................5E Hitchin [HIT] 2........................1540 1/2...................1530 1/4....................10E Arlesey [ARL] 2......................1544 1/2...................1535............................9E Biggleswade [BIW] 4............1548.........................1538 3/4.....................9E Sandy [SDY] 2........................1550 1/2...................1541 1/4.......................9E St Neots [SNO] 1....................1556 1/2...................1547 3/4.....................8E Huntingdon [HUN] 3.............1602 1/2...................1554 1/4......................8E Holme Junction [XHO].........1611 1/2.....................1604............................7E Fletton Junction.....................1617 1/2....................1611..............................6E Peterborough [PBO] 5.........1620 1/2/1632 1/2..1624 1/2/1629 1/4.....3E Helpston Junction.................1640.........................1637 3/4.....................2E Tallington Junction...............1644 1/2...................1643.............................1E Stoke Junction.......................1702/1710................NoRep/1712 1/4.........2L Grantham [GRA] 2.................1716 1/2....................1720............................3L Claypole Loop........................1725.........................1728.............................3L Newark North Gate 1............1730/1734 1/2.........1734 1/2/1734............RT Newark Crossing East Jn....1737..........................1738..............................1L Gainsborough Lea Road ....1819..........................1821.............................2L Gainsborough Trent Jn........1827 1/2...................1823............................4E Bessacarr Junction...............1849 1/2...................1842............................7E