West London Line
Trains are operated by Silverlink and run about every half an hour. The line is linked into the national network and so it also receives trains from [Southern]? ([Watford]? to Gatwick Airport) and an awful lot of freight.
The line can be useful as part of a local cross-London journey but is not of much use to connect the Virgin West Coast main line to Birmingham and Scotland since their trains do not stop at Willesden Junction. However, Watford or Harrow to South London is much quicker this way than via the tube.
Connections can be made at Willesden with the Silverlink North London Line.
The West London Line Group represents the interests of passengers on the West London Line and now has a website.