Didn't hang around for final result, but I should be about 412 miles.
I set out with a target of 400, and my plan showed an outcome of 414, so very happy with the final result.
Weather was far from perfect - too much wind for most of the day, rained for about 4 hours during the night, but at least sunshine at the finish.
There were some big distances on the day - I believe there were at least two 500+ (one might be a new course record).
My 412 breaks the existing club record, however there were two of us from the club taking part, and he did about 20 miles more - great result for the club - slowly I am spreading the message that 400 and 600 Audax rides are great training for 12 and 24 hour TTs.
Had my road bike in standby because I didn't think I'd be able to withstand 24 hours on my TT bike. I wouldn't say it was comfortable, but I did survive the distance on the TT bike.
Enjoyed the whole thing a lot more than I thought I would. Great to see many familiar Audax faces. And as others have said it is amazing to be cheered on by lots of total strangers.
My family support crew did really well - they based themselves at Press Island, and were always on standby to drive out to me if I needed them (thankfully not needed). During night time the loop is about 2 hours, so they get the chance of two or three 1.5 hour naps.
For me this was on my bucket list to do it (and get 400+), so not sure I'll be back for another go, but never say never.
I would thoroughly recommend this event to anyone that enjoys doing 600s and finds that they can cope with little or no sleep on these events.