John Rumm wrote:

Dave wrote:
Thanks for your reply.

I've given it a go, but the pipes are not budging. I'll try again
after we have eaten.

Can you cut the pipe off below, and worry about getting the ends out of
the shower later?

I suspect that the fault might not be repairable, so that is an option
to look at.

Every time I am in that room and looking at the shower, I can see the
enormous amount of work to recover the job, if we have to get a new
shower pump :-(

Dave