I heard over at Tatenhill that a solo student flew from Shobdon to Wellesbourne, then didn't like the weather. An instructor flew over with a PPL in another R22, and took the student back. The PPL took off in the other helicopter and crashed. The weather was apparently pretty awful.
I've heard this from two separate sources, so it's probably roughly correct, though of course I can't be certain. It could explain the confusion over whether there were one or two people aboard.
I'm posting this to hopefully clear up confusion, not speculate as to causes etc.