BBC One HD Sound Problems

Is this affecting anyone else?
I can't find much on twitter.

It's a hissing noise, seems to be fine on BBC One Yorkshire.

BBC One Scotland HD is all fine here as we have Holby City instead...

I had it, and so turned over - it hurt my ears!

The problem seems to be persisting, I thought the feeds were monitored for problems?
I half expected the titles the stop and for them to play some music whilst they fixed the problem.

The feeds are monitored & the problem was looked into & put right by those with the power to do so

As not all feeds were affected it was not appropriate to go into breakdown.