Average joe ATCO works MMAANNSOOO
So roughly speaking 48 hours every 10 days (non 24 hours units have a 9 day rota)
Average valid controller after 3 years is around £2600/month after tax
Once you get up the scales the complexity of the unit determines your salary but an 'average' ATCO (if there is such a thing) is taking home £3500/month I would guess, but the variety of bands and steps makes that a very approximate estimate