“It may be that, on balance, [Mr Brimelow] was a successful backer of horses and greyhounds - he certainly had sources of information not open to most people - and it may be that some part (possibly a large part) of the amounts in column 5 are really attributable to betting wins. But that is pure conjecture. He produced no evidence. If a man makes substantial sums of money in betting - and a number of people do so - it is not unreasonable to expect him to keep records of his betting transactions so that, if he is subsequently challenged by the Revenue authorities to explain an increase in his wealth, he can satisfy them that it is not due to any undisclosed taxable profits but to his betting winnings. If he chooses not to do that, he runs the risk of having attributed to taxable profits what, if he had kept records of his betting transactions, he might have been able to convince the authorities were in fact untaxable betting winnings.”
“…the duty under subsection (1) or (2A) above to preserve records may be discharged by the preservation of the information contained in them; and where information is so preserved a copy of any document forming part of the records shall be admissible in evidence in any proceedings before the Commissioners to the same extent as the records themselves.”