After the fiasco with HTC help line, I called O2 as I wanted to see what I could do in the event that HTC said the phone was out of warranty and would charge stupid money to repair it.
Their repair centre was supremely helpful, and thorough and after 40 minutes on the phone to them and working through my mobile, I got it working as it should have done in the first place.
I can't believe the HTC team didn't take the time to talk me through and trouble shoot like the the chap at O2 did.
10 out of 10 to O2 for the help.
0 out of 10 to HTC