Finally managed to get an iPhone4.
The attempt to get one through Apple was getting frustrating, it seems that they have daily deliveries but these are often gone by lunchtime and with no weekend deliveries it effectively ruled out any chance of getting one for me.
Because I work for a certain well known mobile communication company, I was able to contact our shops directly (the website only gives a generic Cust Services No.) and after about 10 calls, finally located one. It meant going to Glasgow - a round trip of 80 miles or so - but I can say it was well worth it.
The phone itself - actually to call it a phone is to do it a supreme injustice - is a remarkable piece of engineering. As Arthur C Clarke said (Clarke's third law) "Any sufficiently advanced technology is indistinguishable from magic".
Apple's back-up service through iTunes worked a treat and after about 30 mins loading all my apps, music, photos and ebooks, the thing was good to go.
The issue with the signal has not proived problematic at all and it seems better than the old 3Gs. The battery life is slightly improved over the last one too.