Last AC employer (local outfit):

Travel Time Paid @ = time
Overtime Rate Saturday = time and half
Overtime Rate Sunday = double
Overtime Rate Midnight till 8:00 time and half but never occured. No sleep time.
Our of town allowance = never happened
Meal allowance for 12 hour day = nothing
Standby £60/week, one in seven. Got called out twice in 18 months.

Last national employer (WR)

Travel Time Paid @ = time
Overtime Rate Saturday = time and half
Overtime Rate Sunday = double
Overtime Rate Midnight till 8:00 double. Sleep time 6 or 8 hours depending who you asked.
Our of town allowance = never happened
Meal allowance for 12 hour day = nothing
All payed weekly.
Standby during week £12 Weekend (Fri night, sat, sun) £84. One in five.

A while after I left this got cut down a bit