The Plain English Campaign's list of examples [0] (linked in TFA) was quite amusing. My favorite:
'the hours of non-hours work worked by a worker in a pay reference period shall be the total of the number of hours spent by him during the pay reference period in carrying out the duties required of him under his contract to do non-hours work.'
'the hours of non-hours work worked by a worker in a pay reference period shall be the total of the number of hours spent by him during the pay reference period in carrying out the duties required of him under his contract to do non-hours work.'
[0]: http://www.plainenglish.co.uk/campaigning/examples