Not 100% certain, I asked him for identification which he didn't have, but we live in a small village and he was chatting to our neighbour who is an Electrician, as if they knew each other, before I answered the door. I will ask him when I see him whether the guy is legitimate.. Also there was no pressure to enter the house or part with money and he told us to think about it and left his phone number for us to call him if we wanted to sign up for this.