As for the F15, for some reason the Americans not only like to take the strangest route through the loop, this one went by us and over the top instead of the south route through to Mach. But they also dont seem to like flying low level. We said they need to come through it in a tornado just once.

Foreign aircraft appear to operate on stricter rules than the RAF. In general RAF low flying is done down to 250ft MSD (Minimum Separation Distance), although 100ft is permitted in some tactical training areas. Looking at some old
Hansard notes, it appears foreign aircraft are generally cleared to 500ft, although German and Belgian aircraft 1000ft. The TTTE (Anglo/German/Italian) when it was still around also had an MSD of 500ft, as opposed to other OCUs of 250ft.
This would explain the F-15 going over the top, rather than down the middle...
