Sir George,
Fair point, there is nothing in the licence about single engined.
But, on perusing the aerodrome licence for LCY it states...
‘No aeroplane registered in the United Kingdom shall use the aerodrome unless there is contained in its Flight Manual data and procedures for approach path angles of 5.5 degrees or steeper and no other aeroplane shall use the aerodrome unless it has data and procedures for approach path angles of 5.5 degrees or steeper which have been approved or otherwise authorised by the regulatory authority of the State in which it isregistered’.
So, assuming few if any of the light singles that use the aerodrome on the Fun Day have anything relevant to the above in their Flight Manuals (despite the fact in practice it's probably irrelevant), how do they get round the requirement if not by operating unlicenced on the Fun Day?