On Wed, 6 Jul 2011 16:29:20 +0100, Bill wrote:

As a temporary bodge, I stuck a bar from a socket set in the end of the
tube and held it there with a clip. It looked as though the inside of
the connector was smooth and the rubbery pipe had been glued into place.
There was no sign of anything looking like an olive.

That pipe looks suspiciously like the black alkathene that out mains
water supply is in. And the elbow a compression elbow. When I had to
repair(*) that pipe I got some metal inserts that fitted (slighly
loose) and used a 22mm compression fitting. It hasn't leaked.

(*) Who runs a mains water pipe through a waste pipe FFS!

--
Cheers
Dave.