Many years ago a publican had an afternoon meeting with a tax inspector in his pub. The publican had been claiming tax relief in respect the upkeep of his 'guard dog' but the taxman was unwilling to concede that this was acceptable.
The publican replied that upstairs in the pub were both the dog and the lunchtime takings. He invited the taxman to go upstairs, on his own, and if the taxman returned with the takings the publican would agree to addback the disputed expenses. The taxman's response was to allow the expense in full.
My thanks to Barry Jefford of George Hay, Chartered Accountants, for the story which was told to him by his client, being the publican in question.