1. The engineer did not come as scheduled 'because of an administrative mistake'. Had to be rescheduled after I already waited for 3 hours. 2. I ordered a longer (10m) cable instead of the 5m one. The order was accepted and the money taken. When the engineer eventually came, he did not bring the cable. Then I was told then that it was too late to change the cable because I already 'used' the delivered 5m cable (put in by the engineer!). 3. It took several emails and 3 weeks to get the refund. 4. In addition, Rip off. After all, it is just a 20A socket and it should not cost nearly £1,000. A local electrician can do better even without the government grant.