Our Class 491 unit is one of two 4TC sets that were purchased from British Rail by London Underground, for use on their overground excursions on the Metropolitan line. In fact, both of these sets comprised vehicles from a number of different British Railways 4TC sets, presumeably in order to get vehicles that were in the best condition at that time.
The set purchased from London Underground by the Swanage TC Group comprises the following vehicles, all of which came from the initial phase of building:
|Vehicle Number||Type||Original Unit Number||Later Unit Number|
As can be seen, all the vehicles of our set originated in different units. It has been decided that our set will be designated number 413 for the future.