In recent months plans have emerged to improve the interchange at West Hampstead in conjunction with the upgrading of the Thameslink station that will be done for the Thameslink Programme.
The various parties actually held a meeting last October but minutes have only just been made available, with lots of new details. The proposals are:
Thameslink Station – a new entrance on Iverson Road and new footbridge to west where platforms are wider to allow lifts. Existing entrance would remain open for people to/from the north. This will reduce pressure on West End Lane (WEL) pinch point.The new crossing provides access to the tube station, which will remain on the other side of West End Lane. I've made a quick mockup of the changes in Google Maps. One victim of the scheme - and likely source of contention - is the trees between Iverson Road and the Thameslink station, because at least some of which will need to be removed to make way for the new entrance.
NLL station – saw off front with a modest development to south at the same scale as current buildings.
West End Lane (WEL) – Make carriageway a uniform 7 metres all the way through and improve the public realm (footways on the west side) and crossings. Fully signalled junction with pedestrian crossing at WEL/Blackburn Road and widened footway between there and to beyond the NLL station would be provided.