Just read on MSE here that from 1st June 2006, BT are increasing the charge for new installations from the current £99 to 124.99.  BT mention the price increase here.

If I remember correctly it was only increased a few months ago anyhow from £75 to £99, and now its gone up yet again!

Is this the sign of things to come now that our beloved Ofcom want to remove most of BT's currently regulated prices?  Ofcom have a consultation out which ends at the end of this month (May) that pretty much spells this out - see this thread.