Do you need a licence to start a consulting business?

Generally speaking, a consulting business will not require a licence in the UK. However, this also depends on the industry you're working in.

Often, professional services will require a licence. For instance, if you're providing legal consulting services, you will need to be a qualified solicitor or barrister to provide legal advice. For more information, you can visit the Solicitors Regulation Authority or the Bar Standards Board.