Third party fitter was brilliant, getting to that stage was a disaster. Application process was long and repetitive, and had to start all over again due to change in application system. Made requested changes to my home electrics, first installer told me work was incorrect. Got provider back again to make requested changes, informed bp everything ready to go and no contact. Had to repeatedly call to arrange an install. No replies to emails. When finally installed contractor informed that the changes had not been necessary. Process added approx 10wks. For a business application I would expect the process to be seamless