As regards the internet link, in the next 3 years you're likely to see VDSL and/or FTTH and/or Virgin's HFC network hit your doorstep, so i'd personally run a couple of CAT5e cables, a couple of fibre tails, and a couple of RG58 F-type terminated coax strands between the outside BT spur/cable manhole and your designated interior edge device.
