Have rebooted router and FVP.
Backwards EPG working at the moment. The iPlayer etc row of icons are OK until I use one of them. Next time they are greyed out until I delete cookies.
Exactly the same symptoms I have had in the past - assuming you mean the icons in the "Players" screen are greyed out and you still have the icons in the bottom row when pressing the white Freeview Play button. In that case, do the icons on the bottom row still work?
I there any chance that you could try a different router that supports your ISP?