I found John's details on checkatrade. I called him at short notice to see if he was available to change out a broken ceramic hob for an induction hob. Although he was busy, he made time to come and asses the job. He rang to let me know he was on his way and he arrived as agreed. As the job was not as big as I initially thought, he was able to install new wiring and replace the hob during the initial visit. I would definitely recommend John, he was punctual, knowledgeable, courteous and reasonably priced.