mikehh wrote:
Is there a gizmo which can connect to my living room wall TV aerial
socket which will send the TV signal to my bedroom TV"s which
presently have set top aerials on them. At the same time I still want to
maintain the lead from the walll socket to my living room TV?

Sure!
It is called a splitter.
http://www.dennysantennaservice.com/1079229.html

Insert it between your antenna and your living room
TV and run coax from it's other outputs to the
cable inputs of your other TVs.

--Winston