ADB 975091 Mentor (Mobile Electrial Network Testing, Observation and Recording) was a Break Standard Corridor (BSK) coach number 34616 built in 1955 by Gloucester Carriage &amp; Wagon company and converted at Swindon in 1973 for use by Network Rail to ensure that the overhead lines meet the specifications required to power trains using the overhead power supply. Part of coach 72630 can be seen to the left.
<p>73 number 962 GBNR DERBY RTC 575O732L01 V * TONB11&amp;12 N 29D A and 73 number 963 GBNR DERBY RTC 575O732L01 V * TONB11&amp;12 N 29D A 
</p><p>9701 99666 72630 975091
</p><p>According to Realtime Trains the route and timings were;
Derby R.T.C.(Network Rail).......1230...........1230.........................RT
Derby Way &amp; Works Sidings...1233...........1243 1/2..................10L
Derby Way &amp; Works Sidings...1247 1/2.....1243..........................4E
Spondon [SPO]...........................1251............1247 3/4...................3E
Sheet Stores Junction..............1259...........1254 1/4....................4E
Trent South Junction................1301............1255 1/4...................5E
Loughborough 2........................1307...........1302..........................4E
Sileby Junction...........................1311.............1306 1/4....................4E
Syston South Junction.............1315............1311............................3E
Leicester [LEI] UDS....................1322...........1319 1/4....................2E
Leicester South Junction.........1337 1/2.....1330 3/4..................6E
Wigston North Junction...........1340 1/2....1343 1/2....................3L
Market Harborough 2...............1351 1/2.....1354 1/2....................3L
Kettering North Junction.........1406...........1407 3/4....................1L
Kettering [KET] 2........................1408...........1410 1/2.....................2L
Kettering SouthJunction..........1410............1411 1/4.......................1L
Harrowden Junction.................1415............1415..........................RT
Wellingborough [WEL] 3..........1417 1/2......1417 1/2....................RT
Sharnbrook Junction................1430 1/2....1430 3/4..................RT
Bedford North Junction...........1441............1440 3/4..................RT
Bedford [BDM] 2........................1442...........1442 1/4...................RT
Bedford South Junction...........1445 1/2....1449 1/2....................4L
Flitwick [FLT] 1.............................1453 1/2.....1459..........................5L
Harlington [HLN] 1......................1457...........1502 1/2....................5L
Leagrave Junction.....................1501............1506 3/4...................5L
Luton [LUT] 1................................1507...........1514...........................7L
Harpenden Junction.................1515............1524..........................9L
St Albans [SAC] 1........................1521............1529..........................8L
Radlett Junction.........................1526 1/2....1536 1/4....................9L
Hendon [HEN] UH.....................1538 1/2....1547...........................8L
Brent Curve Junction................1542 1/2....1550..........................7L
Dudding Hill Junction...............1545 1/2....1554 1/2....................9L
Acton Canal Wharf....................1552...........1601 1/2.....................9L
Acton Wells Junction................1554 1/2....1603 1/2....................9L
Kew East Junction.....................1559...........1613.........................14L
New Kew Junction....................1601............1612 3/4...................11L
Barnes [BNS] 1............................1609...........1621 3/4..................12L
Clapham Junction 3..................1616............1631 1/2...................15L
Factory Junction........................1624 1/2....1640........................15L
Voltaire Road Junction.............1626 1/2....1640 3/4.................14L
Denmark Hill [DMK] 2...............1631 1/2.....1646........................14L
Crofton Road Junction.............1632 1/2....1648........................15L
Nunhead [NHD] 2......................1635 1/2....1650 1/2..................15L
Bellingham [BGM]......................1640 1/2....1656 3/4.................16L
Shortlands Junction..................1644...........1702 1/4..................18L
Bickley Junction[XLY]...............1647...........1707 1/2.................20L
St Mary Cray Junction..............1647 1/2.....1709 1/4..................21L
Swanley [SAY] 2.........................1651 1/2.....1714 3/4.................23L
Otford Junction[XOT]...............1701............1723........................22L
Sevenoaks [SEV] 3....................1706...........1728........................22L
Tonbridge [TON] DF.................1716/1724..1736 3/4/NoRep..20L
</p>
Tonbridge West Yard...............1727...........1747........................20L
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