You would need to know what the siemens legal challenge was about In The first place So you know why they Called the Tender into question since they clearly through there Was something that was either not right or a bit Unfair in some way or they felt there was some Preference To other manufactuers such as those who built them in British Or those who Built Stock in Derby.
Honestly I don't know if that was the case but the clearly felt there was something that was not on a level playing field as they would not have been talking about legal action in the first place. However it is a bit strange that an manufactuer has won a tender without a specification already being nailed down.....