mike wrote:

But what about now; is there some sort of sticky which is
unconditionally strong, but the fixture can be chipped or pried off
without damaging the surface, I don't care so much about damaging the
fitting, so perhaps it could be broken up a bit, and solvent applied.

I read of very strong jollops here, but are they perhaps _too_
strong and would wreck the wall : (

You could try a building adhesive of the No More Nails variety. Try some
first on a spare tile to make sure it comes off again.


--
Dave
The Medway Handyman
www.medwayhandyman.co.uk
01634 717930
07850 597257