MuddyMike wrote:

We have an annex to our home we let as a holiday apartment. Some clients ask
if wireless internet is available. It is but only if they care sit in the
garden as the existing signal does not reach the annex. I don't want to move
the route as it covers our house perfectly, is there a way of adding
wireless to the annex from our existing connection? Something I can switch
on when required perhaps?

As someone mentioned in the other thread, you could get a WiFi repeater,
you would site this somewhere where it could "see" your existing WiFi
access point, and where it could "be seen" from the annexe ... OR you
could wire an ethernet cable from your router to the annexe, and install
a separate WiFi access point there.