Andy Hide wrote:
I need to make holes in a single brick thick solid plastered wall to
run both 15mm and 22mm copper pipe.


snip

2) All I have at the moment is a 570W B&D Hammer drill. Is it worth
investing in a cheap SDS drill (e.g. £30 Ferm model in Screwfix) or
hiring a decent one? Can you get anything decent for around the £100
mark as it's likely to be used for other jobs in the future but I
don't want to spend £500.

snip

Others have addressed your main points, and I'll just confirm that for £100
you get a respectable SDS drill. There have been many discussion's here on
SDS drills, cheap and expensive, but I wouldn't bother Googling as you'll
have to wade through a fair pile of crap,as to get the decent info.

I've got the Bosch SDS that is available in Argos for about £90, and am very
happy with it. Spend the money and buy this or something similar ,and you
will soon find yourself wondering why you never got around to purchasing it
sooner.

cheers

David