Tdv8 remote locking issues

Hi all!
I have a 2007 tdv8. My remote locking has deteriorated over the last 3 or 4 weeks to the point where it no longer works. The spare won't work either. The car still unlocks manually and after turning the key the alarm stops and it starts normally. The fob flashes fine and still operates the mirror puddle lights so don't think it's a fob issue. I don't know if it's related but my tv signal has always been poor but also I lost radio signal recently too . Any advice would be greatly received.

Do all doors lock/unlock manually off the key? Assuming a full size Range Rover

Hi Yes it's a vogue...key unlocks the drivers door then I can use internal switches to unlock the rest and the boot.