In message , T i m
writes

Well, that's the key but I would still be inclined to check to see if
the router AP might still need to be turned of for fear of it taking a
connection in some instances and then causing a mobile device to drop
as you move away from it and to a Mesh unit?

I don't think that is a current problem in this house, as we (self and
wife) tend to use laptops and iPad in one place, most of the time. The
real test will come when son next returns home as he uses his mobile all
the time, all over the place. That will be the acid test. At present,
it all works well for the two of us, and we're happy to leave well alone
unless or until we notice a problem.
--
Graeme