I made the move the other way, trucks to coaches… 
Yes service work is crap, First is crap but Slavecoach is crapper… 
At Slavecoach in the month I was there before being sacked I only had 4 days off and never saw the other half because of the permanent lates and nights (Slavecoach claim to be “family friendly” - not fun in Oxford on a Friday and Saturday night…