Are you looking for a PVR? Freeview? She wants to record stuff yes? I got my 80+ Mother a Humax, she did struggle to start with but now manages ok, not the greatest remote control and not the best EPG, but it's ok.
For the basic channels Freeview should be the easiest for a non technical person as the channel numbers match the old analogue (BBC1 = 1, BBC2 = 2, etc.) rather than the add 100 on Freesat (BBC1 = 101, BBC2 = 102, etc.).