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Deleted member 422
This is getting pathetic...yet you make a comment which has already been made and incorrect.This is getting pathetic to be honest, A SRM has two Doors A NRM is a Shorter version of the NB4L that still has 3 doors.
The NRM is rather simple. The original design was called the NB4L. This changed to the NRM (New RouteMaster) when it went into production. They are all 11.2m bar one, which is 10.6m instead.Well variations then. The whole NRM story is rather confusing with so many unnecessary differences.
Thats is the NRM story.
There was a large alteration to the rear door workings for health and safety issues, whereby one of the doors no longer opens. However that is not really noticeable.
There is then the SRM (Officially called VHR's) which stands for Son-Of-RouteMaster, where it is a merge of this and the Gemini3 on the B5LH chassis as you seem to grasp :P