@MFillingham during installation did you see how they routed the power cable from the meter box to the consumer unit. I’m interested to know how they get the cable from one to the other…..do they go thru the cavity and along the cavity following the path of existing cables. @kezo might know.
Installation work for the charger is done from your meter box – your consumer unit is completely seperate and not touched.
The Henley block (black box to the right) splits the tails coming from the meter to consumer unit. Another set is then connected to supply a small consumer unit (situated just outside your meter box) that will supply your charger. The little black box with the red & black wires coming out is the CT clamp, that will monitor your homes total load.
As for kezo might know he does lol.

@Tgreen what assumption have you come to, that it wont be FOC?
If it was chargeable, the DNO would charge for cut-out changes!
Minor or street works for a cutomers installation of first EVCP or HP is not chargeable.