On Wednesday, 26 September 2018 13:15:06 UTC+1, wrote:
On Tuesday, September 25, 2018 at 3:11:01 PM UTC+1, wrote:
You can get hollow tubed plastic ties from most garden centre that do exactly what you want.

Jonathan

Thank you; I must look out for those! Meanwhile, I'm going to try various hitches that may do the trick, such as the one Andy suggested.

Al

The stuff I have got came in a plastic bag as a big loop and you pulled out the length you want and cut it off.

Jonathan