New Zealand's Problem Gambling Foundation had filed an official complaint to the country's Department of Internal Affairs (DIA), with the DIA confirming that 22Bet's adverts are misleading because "they are not a registered New Zealand sports bookmaker, nor are they licensed or regulated in New Zealand by the DIA".

However, the ECB said it had looked at the matter from a "regulatory and employer perspective" and concluded that McCullum had done nothing wrong. It is understood that the anti-corruption code signed up to by players and coaches does not prohibit such brand ambassador roles.

An ECB spokesperson said: "Discussions have been ongoing with Brendon over the last few days, and the matter has been considered from an employer and regulator perspective. We can confirm that no further action will be taken."