Fitting quotes
Plugging the device in is yours. An outdoor socket, or any change to the circuit itself, is not, and that is more homes than the adverts suggest.
An outdoor socket has to be IP55 or better. If the circuit's overcurrent protection device has to change, the specification is explicit that only a qualified electrician may do it.
Tell us the postcode and what the surface is and we will put you in front of someone local who has actually read the new rules. If your answers show the permitted development right does not cover you, we will say so instead of sending anyone out.