I never use the Cotswold line simply for the reason that the HST diagrams are occasionally turbos, and i just can't imagine sitting (or standing?) on one all the way from Worcester - Paddington. A shame as it is a nice journey and Worcester is quite local to me, but the amount of times i've seen Turbos sat at Paddington on Hereford diagrams instead of HSTs...no thanks! It's also a rather expensive route, as there are no advance fares available. I'm not paying full fare for standing on a Turbo when i could have an HST!