On 10/03/2011 22:46, jgharston wrote:
Steven Campbell wrote:
As I was drilling the remainder of the brick to hold the back box, the brick
fell into the cavity so I'm now left with a hole with no place to secure the
back box!!

You're lucky. My sister-in-law was chiselling out a hole for a back
box when the bricks fell out into the next-door room leaving a nice
brick-shaped hole through the wall.

JGH

I've done that - a couple of days after decorating the other room

The funny one though was when we had cavity wall insulation put in. The
whole house is cavity wall, except for one small section - they totally
filled the electricity cupboard! Luckily it was a blown fibre and could
easily be removed.

SteveW