Yes, it's all fine now. 500ma fuse is in and the amp is working and sounding fine. There was a microphonic 12AX7 in V1, which made a horrific noise when on the OD channel and PAB engaged, but that's been changed and all working. The tube must have took a knock also somehow. It's not the most sturdy of amps though. I have a Vibrolux Custom which has been going solid without any problems for years.
Saying that, I can now really tell how touch sensitive the amp is, not even by playing a string. When you move around with the guitar lead, you can hear the signal passing through it, it's wicked. The amp really is ALIVE!!!