over the last couple of weeks my freeview reception has started to become frustratingly non exisitant.

We have had the freeview set up on both our tvs for 4 years now.  One has a freeview box and the other has an inbuilt one.

We have never had any reception issues up until now.

During the last couple of weeks there were 3 or 4 days where there was no signal at all.

On saturday and sunday there was no signal for several hours and then it just starts up again.

Has anyone else had this problem?

Any suggestions as to what the solution is?