Thank you gents, your comments have helped no end. I shall probably be looking at the Sorby Patriot chuck as reviewed by Lew.
John, I had a quick look at the other two Axminster offerings, the K10 and the Goliath that you mentioned but am a little concerned that the shorter length of the chucks would possibly mean large pieces would foul the motor when, as Lew mentioned the motor on my lathe faces the bed.
Dave, thanks for the tips on work holding and no I hadn't been told this before. It makes perfect sense and I think I had sort of come to that conclusion myself but will now make sure I use the right sized spigot, jaw size, combination in future. Might be why I had to dodge a lump of Walnut as it shot off the lathe in my first few months of woodturning
Jon