This one is not risk-free, and that is worth knowing before you start. You put £10 into BetMGM and place one qualifying bet, which we match on the exchange so it costs you roughly 50p to £1. That gets you four £10 free bets. None of the four can be laid on the exchange, so they are real bets: you pick the selections and keep whatever wins.

£20 is the average across many runs, not a figure you lock in. Some runs pay more, and in others none of the four land and you finish 50p to £1 down. Over time the odds are in your favour, which is why it is on the list. Only take it on if a losing run is fine by you.

It takes about 30 minutes of actual work, spread over a couple of days. The money you put in is not spent. It moves between your accounts to cover both sides of the qualifying bet, and comes back when you finish.