Paul Terry wrote:
The .pdf street maps in the
TfL Journey Planner also appear to be quite accurate, though it
can be tricky to get it to display the one you want.

Unless I'm looking at the wrong ones, they don't show tube-line
routes.

You have to devise a route that uses the tube line in question. For
example a route from postcode W1G 6BW (The London Clinic) to Southwark
will involve either walk-tube or walk-bus-tube, and in all cases the
tube is the Jubilee Line from Baker Street. If you view the details of
any of these routes and click on "start map" for the initial walk, it
will show not only the walking route but the subsequent Jubilee Line
route passing near Regent's Park station.

I have never seen one which shows the two sharp double-bends on the
Piccadilly Line east of South Kensington.

My 1948 Bartholomew's Greater London Reference Atlas shows it very
clearly at 4" to the mile

Interesting! My Bartholemew's of 1956 (3" to the mile) shows a left
bend after South Ken, then a straight north-easterly run (not following
the road pattern) to a second left-hander to align with Brompton Road,
then a right-hander following the curve of Brompton Road by the Oratory.
If yours shows the correct left-right-left-right sequence, which roads
does it run under?
--
Richard J.
(to e-mail me, swap uk and yon in address)