Andy Hall wrote:

There are some plugs that I found on the Screwfix site 89036 which go
into a drilled hole and then a cable tie can be attached. I bought
some and they work well.

There are a few varieties on that theme:

http://www.towerman.co.uk/pdf/fixings/hammerfix.pdf

I quite like the fifth one down with conventional cable clips.

--
Cheers,

John.

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