I had done 8 laps by about 8pm ish, decided to get a proper feed and a cup of coffee so ended up in my tent for about an hour before do my night laps, unzipped the door to get my lights and the cold sent me into shock, zipped it up and huggled into my sleeping bag.
I stayed their sleeping / naval gazing until 6.30am and grabbed a bacon bap and a coffee, took the tent down and packed up ready to go home pissed off with myself, then all of a sudden I had second wind grabbed my kit and knocked out 4 continuous laps between 8am and 11:54am.
That made me feel a tad better.