The plot thickens, the sub contractor has arrived, nice chap. Turns out he is a commercial electrician who has watched a 50 min video as his training on how to install a Ev charger!
The company he works for have no work so they have picked up a contract with BP, to clear the backlog of outstanding jobs! He also confirmed that in the 2 weeks he has been doing installations for BP, that all the customers have complained about the service provided by BP! Be it delays, or lack of communication.