Strange, when I phoned the CAA FCL, they informed me that an FI must be present as under the AFI.
So those who are supervising the FI(R) on the end of a phone and not at the point of first departure, I suggest that you call the CAA and ASK THEN rather then just trying to interpert LASors to suit your own needs!
It would be unfortunate if any incident occured and YOU where not there!
If anyone else cares to phone the CAA and find out then please post this here as this should be sorted out so that no confusion reigns.
Then we can all worry about their students first solo!