The solution: a log book that lists your hours and the tasks you performed each day in detail on a property by property basis.

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Some local authorities in London are piloting a log book for all reported homophobic incidents, which Mr Jennett said should be extended to all schools, including primaries.

BBC: NEWS | UK | Education | Young children 'learn homophobia'

The explanation - that Raissi made a mistake in filling his log book, that he had flown in the Piper not on March 8th, but March 9th, a date which tallies with flying hours that were also logged.

BBC: Lotfi Raissi transcript

Much of the book is written in the style of a personal log.

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