John Rumm wrote:

What surface are you fixing it to?

The last one I did onto tiles, I simply ran a few beads of silicone over
the back and stuck it on (held in place with some tape until it dried).
To get it off I would simply run a cheese wire behind it to cut through
the silicone.


Yup, tiles as well.
Now that sounds like a good Plan B - never thought of silicone. If I
can't find the aforementioned fixing kit I might give that a go.

Cheers,
Martin