Just for the record in dunnunder:
L following M 5nm (except light medium then nil)
M following H 5nm
L following H 6nm
A380 lots - hopefully under review
special standards for 757 (meduim when following, heavy when leading)
Bust any of these standards and you are stood down pending investigation.
Interesting how different they all are! I thought we were pretty well ICAO standard...
Blue