On Fri, 16 Mar 2018 12:55:14 +0000, Roger Hayter wrote:

Nearly all pipe clips require the pipe to be positioned, the clip
positions marked, then the pipe removed, the clips screwed in, etc


Your doing it arse about face. Decide where you want the pipe to be,
fix the clips, fit pipe to clips, PoP.

https://www.ebay.co.uk/itm/Plastic-F...per-Pipe-Clip-
15mm-22mm-28mm-Diff-Qtys/332565407571

Look a bit ugly to my eyes.

--
Cheers
Dave.