The Daily Mail in their usual lazy fashion have just stolen the article from gamblingonlinemag. Their article is much better and I think he almost certainly got banned from just sitting at the table drinking their free drinks and not actually betting for most of the night. He just picks two sets of four numbers, and then waits until none of those numbers have come up for 12 spins. He then bets the two sets and repeats, increasing some bets but not doubling like martingale. He sat with the journo from the mag for four hours and won the massive sum of ..... £3.40.
The journo makes it clear that the "system" is just rubbish, and he has no advantage over any other punter using any other method or system