I’m leaving my FT job but my employer has said he would like to offer me any ‘ad-hoc’ work that may come up if I am willing and available. I’m happy with this, as I hope to get part time work elsewhere so could combine it with that. He has said he will keep me on the payroll but I am not sure how this might affect tax in any new role/s I begin. The ‘ad-hoc’ work is unlikely to be very regular so I’m not sure I could or should class it as a second job for paperwork purposes. Does anyone have experience of this? Thank you.