Combining self-employment and PAYE

The Woodcock

I finished work as a PAYE worker in August, received a P45 etc.
Since then I have done a small bit of freelance work for a company with the possibility of more work to come in the next few weeks and months, although nothing certain. This is just intermittent, part-time work that won't bring in sufficient income to keep me afloat.

In the meantime, I am also looking for a full-time job but it's hard to say when and where I might get work. I didn't bother signing on since I finished work, I'd prefer not to be on social welfare and I've enough savings to tide me over.

Do I need to register as self-employed for the purposes of the income I'm earning from the freelance work? And what are the implications if I then get a PAYE job (possibly part-time) in the coming months?

In other words, could I earn some of my income as a PAYE worker while simultaneously being registered as self-employed?

Gard1

You can have income from paye and Self assessed
Register for Income Tax and maintain books and records for the period of work.
You can keep the income tax registration open so any work you do on a freelance basis even if you get a PAYE job can be declared.