Andy, I would suggest you wire using the following:
1 x Triax 304115 in the main TV position (3x WF100 and 1x Cat5/Telephone)
http://www.triax.co.uk/Products/Wall%20Outlets/Triax%20Screened%20Outlets.aspx?productId={F44967B9-2E2F-488E-8AF0-34184D2C9A5D}&Tab=0
1x Triax 304109 at each other...