oh god about a load of ambigious crap, yes go Prof Birch lets ditch it.
Honestly, one could be forgiven for confusing
s41(3)(b) taken place at same time
and s.41(c) about took part as part of the of the event
(unless I am thick, they seem similar and confusing)
I do beleive that s42(b) wins the day, the fact she willingly had sex before, if proved, would give him a 'mistaken belief as to consent'