Pete wrote:

I contemplated stalking sky vans from the above suggestions ..... buuuut I
had a butchers on ebay and found some double ones under the search of wall
tidy and wall grommit.

Thats for all the excellent ideas.

As a general comment on this whole thread (and the Subject isn't the
correct spelling grommet?

I blame it all on Wallace and Gromit! (I hope I've spelled that right).

Oh, my dictionary does give grummet as an alternative.

--
Chris Green