Out-of-the-way trains

In lots of other threads odd long-distance services that take odd routes or travel huge distance between otherwise unremarkable place have been mentioned and it would be great if we could make a list of them or something like that to fully view the wonders of privatisation long distance inter-regional travel that no longer exist.

Current

Arriva Trains Wales
1239 Holyhead-Maesteg

CrossCountry
0710 Gloucester-Stansted Airport
0820 Aberdeen-Penzance

Former

'One'
Peterborough-London Liverpool Street via Bury St. Edmunds

Wrexham & Shropshire
Wrexham General-London Marylebone via Shrewsbury & Tame Bridge Parkway

Wales & West
0929 Pontypridd-Par via Ninian Park (summer 2000 timetable)
London Waterloo-Manchester via Warminster, Bath, Bristol, Hereford and Crewe
London Waterloo-Milford Haven via Warminster, Bath & Bristol
Penzance-Manchester via Abergavenny, Hereford and Crewe
Cardiff-Holyhead via Llandudno (think about it :P)
0900 Treherbert-Gunnislake [1]

Central Trains
0615 Grantham-Hereford (summer 2000 timetable)
1518 Skegness-Aberystwyth (summer 2000 timetable) [2]
0726 Pwllheli-Grimsby Town [3]
Skegness-Manchester Airport (summer 2000 timetable)
Stansted Airport-Great Malvern (summer 2000 timetable)
Stansted Airport-Aberystwyth (summer 2000 timetable)
Great Yarmouth-Liverpool Lime Street (summer 2000 timetable)

Arriva Trains Wales
Swansea-Bangor via HoW line and Crewe arr. 0046 [4]

Anglia Railways
Norwich-Basingstoke via North London Line - "Crosslink"

Please everyone add to this list :)