wrote in message
...

The Thameslink route from St P (take a look at the new tunnels to the GN
from the platform) to Blackfriars (new southern entrance) or London
Bridge
is interesting.

Definitely not much to see there. I've done it.
When? There is a huge amount going on at London Bridge. The next few weeks
are the last chance to travel through Borough Market junction and the
high-level station before it all changes beyond recognition. You might also
get to see some work on the Bermondsey dive-under on your way to/from
Crystal Palace.

--
DAS