On Thu, 13 May 2010 15:08:54 +0100, Appelation Controlee wrote:

There's a brick adrift in one of our outside walls, and I'm not sure how to
go about sorting it out.
Mortar lines are very slim, so there's not much space to operate, and the
brick has slid back a little, into the cavity space, with next-to-nothing
to get hold of.
Any suggestions for how I can deal with this?

The offending item can be seen he http://bit.ly/bw3Guv

Thanks to all for the practical suggestions - yes, the bricks are
Accrington ("Acky" being the term used by the guy who fitted our new
windows).
I'm thinking of using urethane foam to bed the brick once I manoeuver it
into position, before "dressing" the pointing gap.