Thanks for the tips guys, much appreciated. Happy Christmas too.
The thing I'm really taking away from this is that not all chargers are as efficient. The 3 socket one I picked up at the local Brico is likely naff.
I'll test some in the new year.
I hear you on the photos too Frank
It didn't help matters when more than once I hastily returned my phone into the racing pocket after taking a couple of shots with it still on.
There was a happy ending to the excess of photos though as Yan H. saw a couple I posted on instgram during the race and asked me to write an article for BQ.
He generously paid me for the piece which ultimately ended up going right back with him to buy some of his bicycle components.