Adrian Auer-Hudson wrote:
GreatWesternSean wrote:
"I can think of many:
2) Central Line & Piccadilly line at Park Royal. There is no station on
the central line at Park Royal despite it running under the piccadilly
line next to Park Royal station.

This should be built in the next few years, though due to a stupid HSE
ruling it will involve a walk rather than just going up or down stairs.

3) Central Line & Silverlink Metro at North Acton. There are no
silverlink platforms at North Acton despite it crossing the central
line here. One has to walk for 20 minutes to get to Willesden Junction
to board a silverlink train.

If you're looking for places lines cross and don't interchange, just
follow the North London Line. District (Ealing), Piccadilly, Great
Western, Central, Northern, and who knows what in the east cross it
without any sort of interchange.

Colin McKenzie