Stroma. Part P is building regs exam C&G 2392 or something close. It's a one day course. You have to test and verify any installation prior to commissioning. You have to issue a certificate for most work. If you do not join a scheme you will have to notify B.C. local authority and the client will have to pay hundreds. If you are with a CPS, they will arrange notification and the client will receive that important document as passed by B.C. saving hundreds circa ÂŁ300.
So you will need CPS membership. Each one will require Qualies, differing with each. They will need insurance PL and for EICR PI. They will want to see your complaints procedure, H&S statement Risk Assessment and method statement. Also some examples of work.