Practising Certificate

I have recently passed my final ACCA exams, and have 5 years experience working in industry and practice. I am looking to set up a company part time, alongside my current full time job.

I would be offering services such as tax returns / accounts for sole traders, partnerships and small ltd companies (who do not require an audit) , aswell general book-keeping & payroll services.

I am finding it difficult to gain information on whether i need a practising certificate to do this? Can anyone provide any advice for me on this?

Thanks,