Got my new router on Saturday & today I finally got the system up & running. It's a fibre connection provided by a French ISP, with an ethernet connection to a 2nd router that I've installed a VPN on, this in turn is connected to a TV & to a satellite recorder by 2 separate ethernet cables. The house has a choice of French or UK wifi & I have access to UK catch up TV, play from start or set up a recording remotely when away from home. It seems to be really good & I'm chuffed to have achieved this as a non-techy 75 year old.
Many thanks to those who've posted advice.