Bronx,
In Great Britain we are F***ing potty.
Not only can you not pick him up from his house etc reason being this would them become a commercial flight so an AOC would be needed.
But lets say that the CAA somehow agreed for you to collect him from his house (And they have) because he only lives two miles from the airfield and obviously no charge could be made otherwise it would be a commercial flight. You then fly him to the airfield and touch down and start your training.
NO NO you can't do that you have to swap seats because the helicopter has a pilots seat and it must be flown from this seat. Only in a training flight can the helicopter be flown from the left seat by a qualified person etc or right seat etc depending on type
This obvoiusly involves shutting down time / money etc becuase common sense has nowt to do with it.