Right, well I have the Sony magnetic charger, I sent it back to sony as I thought it was to blame, it was working then stopped.
However when it was returned to me, I went to use it, the charge started and then stopped, so I thought it was the magnetic dock again, took the phone off the magnetic dock and these was a hole where the docking pins should be . Turns out they were on the magnetic dock! come out completely, so put the charger point bar back in the phone, reconnected and yes it charged but again, when I came to undock, phones charger area left on the dock. So it happens with the OEM dock as well.
Looks like a fight with Vodafone to get the phone repaired.