File:66723 Mountfield to Doncaster Down Decoy 4E19 empty gypsum (16964166408).jpg

GB Railfreight's class 66/7 (JT42CWR) number 66723 . Here it is photographed hauling empty gypsum containers mounted on flat wagons from Mountfield Sidings (GBRf) East Sussex to Doncaster Down Decoy (4E19) on 13 April 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..........................1130.............................RT Mountfield Tunnel................1132..........................1130.............................2E Robertsbridge [RBR]............1134 1/2....................1135.............................RT Wadhurst [WAD]...................1147...........................1144 3/4......................2E Tunbridge Wells [TBW] 1.....1156..........................1151..............................6E Tonbridge [TON] 2...............1215..........................1234...........................19L Sevenoaks [SEV] 1................1225.........................1246...........................21L Chelsfield [CLD]....................1231 1/2....................1252 1/4....................20L Orpington [ORP] 2................1233.........................1254 1/4.....................21L Petts Wood Junction...........1234 1/2...................1258 1/4....................23L Bickley Junction[XLY]..........1252.........................1259.............................7L Bromley South [BMS]...........1257.........................1302.............................4L Shortlands [SRT]...................1300.........................1303.............................3L Shortlands Junction.............1301..........................1303 1/2.......................2L Bellingham [BGM].................1304 1/2...................1306..............................1L Nunhead [NHD] 1..................1308.........................1312 3/4.......................4L Peckham Rye [PMR] 3.........1309 1/2...................1314 3/4.......................5L Crofton Road Junction........1310 1/2....................1319 1/2........................9L Denmark Hill [DMK] 1...........1311 1/2.....................1320 1/2......................9L Voltaire Road Junction........1317...........................1325.............................8L Clapham Junction 5.............1330 1/2...................1334 1/2.......................4L Wandsworth Town 2............1332 1/2...................1336 3/4......................4L Putney [PUT] 3.......................1335.........................1338 3/4......................4L Barnes [BNS] 3......................1337 1/2...................1344 1/4.......................6L Barnes Bridge [BNI] 2..........1339 1/2...................1349.............................9L Chiswick [CHK] 2..................1342.........................1352...........................10L New Kew Junction...............1344 1/2...................1355...........................10L Kew East Junction................1347 1/2...................1356.............................8L Acton Central [ACC].............1355.........................1359 3/4......................4L Acton Wells Junction...........1357 1/2...................1401 3/4.......................4L Willesden Junction 4...........1359 1/2...................1404.............................3L Kensal Green Junction........1403 1/2...................1406.............................2L Brondesbury Park 1..............1407..........................1408 1/2.......................1L West Hampstead 2..............1409 1/2...................1410 3/4........................1L Hampstead Heath 2............1413...........................1413 1/4.......................RT Gospel Oak [GPO]................1415..........................1415 1/4.......................RT Alexandra Palace 3..............1443 1/2...................1441.............................2E New Southgate [NSG] 4......1446.........................1444 1/2.......................1E Oakleigh Park [OKL] 4.........1450.........................1449............................RT New Barnet [NBA] 4.............1451 1/2....................1450 1/2.....................RT Hadley Wood [HDW] 4........1454.........................1454 1/2......................RT Potters Bar [PBR] 4...............1458.........................1500.............................2L Brookmans Park [BPK] 4.....1501..........................1502 3/4......................1L Welham Green [WMG] 2.....1503.........................1504 1/4........................1L Hatfield [HAT] 3.....................1507.........................1508 1/4.......................1L Welwyn Garden City 3.........1511 1/2.....................1513...............................1L Welwyn North [WLW] 2.......1526 1/2...................1515 1/2......................11E Woolmer Green Jn...............1529.........................1517 1/4.......................11E Knebworth [KBW] 4..............1530.........................1518 1/2.......................11E Stevenage [SVG] 4...............1532 1/2...................1521.............................11E Hitchin [HIT] 2........................1540 1/2...................1526...........................14E Arlesey [ARL] 2......................1544 1/2...................1531............................13E Biggleswade [BIW] 4............1548.........................1534 3/4....................13E Sandy [SDY] 2........................1550 1/2...................1537...........................13E St Neots [SNO] 1....................1556 1/2...................1545............................11E Huntingdon [HUN] 3............1602 1/2...................1552 1/4.....................10E Holme Junction [XHO]........1611 1/2.....................1611 1/4........................RT Fletton Junction....................1617 1/2....................1619...............................1L Peterborough [PBO] 4.........1620 1/2/1632 1/2..1623 1/4/1629 3/4....2E Helpston Junction................1640.........................1638 3/4......................1E Tallington Junction..............1644 1/2...................1643 1/4.......................1E Stoke Junction......................1702/1710................NoRep/1711..................1L Grantham [GRA] 2.................1716 1/2....................1718...............................1L Claypole Loop.......................1725.........................1725 3/4.....................RT Newark North Gate 1............1730/1734 1/2.........1731 3/4/1731..............3E Newark Crossing East Jn....1737..........................1736............................RT Gainsborough Lea Road ....1819..........................1817.............................2E Gainsborough Trent Jn.......1827 1/2...................1819.............................8E Bessacarr Junction..............1849 1/2...................1838............................11E