My broadband router drops out (DSL light goes out) every time I run
either my planer or my radial-arm saw. Nothing else seems to do it,
even the 3KW router with a big bit. These machines both have induction
motors, which I guess have a big start-up current.

I was planning to put in a new feed with 10mm T&E from the CU (about
35 metres - all in the loft of the bungalow) to the workshop, but it
occurs to me to ask here first as there may be other things I can do to
help protect the router. The router is currently on the same ring main
as the workshop.

R.