The saga continues! Though there is a fault showing on my virgin media covering all services (except phone) so hopefully that is what they are fixing today (says by 12:30 but we'll see)
I've had upstream power wildly vary from 20 to 55+ all morning and lots of T3/T4 timeouts with the modem constantly searching for upstream channels, every single one it locked onto said "failed" with increasing T3's until it hunted again and got another in a loop, I am guessing the fault is caused by a failing amplifier in the cabinet?