If however, you are VFR into the Uk, then a Phone call to the "Parent Unit" to close the FPL is in order.
Surely, Chiglet, this only applies if you have nominated the Parent Unit as the 'Responsible Person' (ENR 1-10-3). If you best mate Bob is your responsible person then providing Bob knows you have arrived safely then no further action is necessary.
When you "Depart", a "Responsible Person" ON THE GROUND may pass your airborne time to the nearest ATSU.
In this case they should inform the Parent Unit (ENR 1-10-3 again)
