Old Smokey (and JT) - many thanks for your wisdom thus far. To draw a drinking analagy, I feel as though I am slowly emerging from a performance induced hangover as your replies help to make it all a little bit clearer each time. I look forward to Oz_Expat's input - should he surface!
It's a lovely day here in Blighty, the sun is shining and the temp has risen from 3 C when I got up to 9C now and we are told it's heading for 17!!
Cheers all,
mcdhu