its either 15 or 20 15 will give you 30k 20 will give you 40k ,your taking in all the call and commission dividing it by 52 and 37.5 and getting your hourly
so you get one lieu day per week on call,thats 7 minus the stat hols that come off your entitlement that leaves you with 2 extra days for working on call for £11 ph and you say the pay is great?id take up petes offer if i was you,the van only has one previous owner,granted he was a knacker