If anyone is interested - here's my thumbs for the routes i have installed
http://defade.com/TS2013/RouteThumbnails+Meta.zip
Contains thumbs for the following:
UK Routes (premium & freeware)
Bishop Aukland - Darlington [JustTrains.net]
Bristol & Avonmouth [JustTrains.net]
Bristol - Exeter [JustTrains.net]
Candlewick [UKTrainSim.com]
China Clay for Export [CreativeRail.co.uk]
Coniston [UKTrainSim.com]
Crouch Valley Branch Line [UKTrainSim.com]
East Somerset Railway [MeshTools.co.uk]
Gloucestershire & Warwickshire (aka The Honeybourne Line) [UKTrainSim.com]
Great Central Railway [UKTrainSim.com]
Lavender Line [UKTrainSim.com]
Llangollen [UKTrainSim.com]
Mayflower Line [UKTrainSim.com]
Newcastle - York (Modern) [JustTrains.net]
South Devon Banks (Historic) [UKTrainSim.com]
Scottish East Coast Mainline [JustTrains.net]
Settle - Carlisle (1960's) [UKTrainSim.com]
Spa Valley Railway [UKTrainSim.com]
Welsh Highland Railway [UKTrainSim.com]
West Somerset Railway [UKTrainSim.com]
Western Rails [UKTrainSim.com]
I tried to use images that best showed which route it is at a glance - eg: The Forth Bridge for SCEML (but obviously some line don't have iconic landmarks, so i chose stuff that seemed easily recognisable)
I also noticed that once images are cropped and shrunk to the needed size, that they became very dark when viewed in TS2013 menus - so i've spent time artificially increasing the brightness of them all too
Hope they help someone at least
