Rupert Goodwins wrote:
Hi, group

Here's a fun page -
http://www.npagroup.co.uk/insar/products/pdf/psi.pdf It shows
satellite interferometry measurements of the centre of London, with
9mm of subsidence caused by the JLE very clearly shown. Nothing
scary - all planned for, it says - but very interesting.

But what's going on between Wandsworth and Battersea or, for that
matter, 2km due north of Westminster?

The Wandsworth-Battersea subsidence was along the line of a new
"electricity tunnel", presumably for national grid cables, according to
news reports when the subsidence was first announced in 2002.

No mention was made at the time, as far as I am aware, of anything 2 km
north of Westminster. But you're right; there is a clear line of
subsidence running east from Gower Street, along the line of Torrington
Place, Byng Place, the south sides of Gordon Square and Tavistock
Square, then under Tavistock Place as far as Regent Square, just north
of Coram's Fields. There is also pronounced (red) subsidence a little
further east, near the Holiday Inn, Kings Cross Road. Does anyone
remember any major excavation projects along this line over the last 8
years or so?
--
Richard J.
(to e-mail me, swap uk and yon in address)