Front door lock problem

The locks for both my front doors suddenly stopped worked at the same time. They are no longer responding to the key fob so I have to lock and unlock both manually.

The rear doors are still responding and working fine.

What could the problem be? Please help.

If its any help....My passenger door "Super locked" and wouldnt lock or unlock from inside or out and the drivers door packed up on the remote at the same time....(worked on key)
Mine was down to 2 faulty door locks...I replaced them both,with advise from people on here,sure they are around £125 ish each but is so much easier than mesing around with keys etc...And its a simple job to do..
Someone else on here may be able to advise you better with rebuilding the locks or reprogramming incase iam missing something...
Cheers
LTel