Thanks for coming back with that info. Looking around elsewhere on this site and it seems that these problems (albeit not always with the same resolution) are coming up quite frequently. I've held off reporting (it'll be the third time when I do), as I have better things to do over the weekend, but intend to have a go at T/S again in the next couple of days to keep the pressure on!
One thing that has come out of all this: I've learnt a whole lot about line-levels, signal strengths etc. Thanks to all guys & gals who've put the various bits of information together.
