Then you got away with someone at the CAA not checking your log book correctly.....
Extract from LASORS:
NIGHT QUALIFICATION (AEROPLANE)
FLYING TRAINING/EXPERIENCE
REQUIREMENTS
When applying for a Night Qualification you must
produce evidence of having met the following flying
requirements:-
a. 5 hours overall night training in aeroplanes to
include b) and c),
b. i. 3 hours dual night training to include ii);
ii. 1 hour dual night navigation;
c. 5 Take-off and full stop landings at night as PIC
of aeroplanes.