Trying to beat 40 - almost

Previous best was 0:42:30. Did this one with the flu and people stopped on every technical bit and dogs running around. Started at Wakehurst parkway mid after riding out there for 15 minutes. Nothing spectacular, put the foot down in lots of places, granny gear up Heartbreak, used the big crank for as much as possible though which was new to me.. I am trying to train to get under 40 minutes.