I've got one of those. The one time it's come up, in relation to out-of-hours support, I made it clear that there are plenty of other jobs. So the arrangement

I've got one of those. The one time it's come up, in relation to out-of-hours support, I made it clear that there are plenty of other jobs. So the arrangement is that I agree to do any overtime that the company requires, free of charge, providing they don't ask me to do any. In the meantime, if there's an emergency I'll do my best. And we get along quite nicely.