Had one today,had to go and finish around a window on a bathroom I finished months ago,they were waiting to have one fitted.
I'd been paid already so he asked how much dosh I want,I told him I'd already been paid,when I was going he gave me £150, he wouldn't take it back,no matter what I said "no,you came back in your own time and did a great job "
So I went for a pint