(31 Dec 2013, 11:48 am)Dan wrote Do demonstrator vehicles being tested on specific services always guarantee an upgrade on those services?
Isn't it just to get an idea of how well they'd cope on different sorts of services, in comparison to the vehicles already offered on that service?
An Enviro 400 demonstrator was trialled on service X1 a good few months ago. This service had just received investment not long before that. The X1 is a very good service for demonstration vehicles because there are different things required of the vehicles which are allocated to that service - dual carriageways, tight bends, uphill, downhill...
As far as I recall, the E400 was a loan to cover for a gemini or two that had to go back and have work done on them.