The wife was away for a few days but has suddenly come home early.
Had it 3 times from 3 different outcall clients, always about an hour before the booking was due to start. Such unpredictable women...
Wife or girlfriend came home
Called into work
Pulled a woman last night
Illness
Wrong kind of drizzle
Sunny weather
Car turned itself around (years before cars could assist driving) (this was after cancelling the other two bookings he made)
Car breakdown
Light aircraft crash
Someone scared I was a scammer cancelled on the day through nerves
I never know if any of these are true or not, but it's the high rate that takes the P.
Some of these happen within minutes of making a booking, some later.