Uk Law
Since the question was raised by a UK located aviator, this is an extract from the current version of the ANO:
(4) Subject to paragraph (5), at the end of every flight by an aircraft to which this article applies the commander shall enter in the technical log or the approved record as the case may be:
(a) the times when the aircraft took off and landed;
(b) particulars of any defect which is known to him and which affects the
airworthiness or safe operation of the aircraft, or if no such defect is known to him, an entry to that effect; and
(c) such other particulars in respect of the airworthiness or operation of the aircraft as the CAA may require; and he shall sign and date the entries.
(5) In the case of two or more consecutive flights each of which begins and ends:
(a) within the same period of 24 hours;
(b) at the same aerodrome, except where each such flight is for the purpose of dropping or projecting any material for agricultural, public health or similar
purposes; and
(c) with the same person as commander of the aircraft; the commander may, except where he becomes aware of a defect during an earlier flight, make the entries specified in paragraph (4) at the end of the last of such consecutive flights.
Any method of recording other than the above, unless specifically permitted in writing by the authority, represents an offence against the ANO.