An interesting one that - Whilst it isnt mentioned in FCL 1.080 it is mentioned clearly in the AMC FCL 1.080 - so much so the example log book contains a column for logging landings (day and night) and it also clarifies the section about 'sole manipulator of the controls' as well. Which leads to to the myth here:
There is no Myth here; JAR-FCL has no legal status except where it is specifically incorporated into the ANO. The legal requirements for log books in the UK are covered solely by Art 79
(2) Detailed information about each flight during which the holder of the log book acted either as a member of the flight crew of an aircraft or for the purpose of qualifying for the grant or renewal of a licence under this Order must be recorded in the log book as soon as reasonably practicable after the end of each flight.
(3) The information recorded in accordance with paragraph (2) must include—
(a) the date, the places at which the holder of the log book embarked on and disembarked from the aircraft and the time spent during the course of a flight when the holder was acting in either capacity;
(b) the type and registration marks of the aircraft;
(c) the capacity in which the holder acted in flight;
(d) information about any special conditions under which the flight was conducted, including night flying and instrument flying; and
(e) information about any test or examination undertaken by the holder of the log book whilst in flight.
That's the "Must" anything else you chose to add is down to the owner of the log book.