The use of a sauna is not banned by the board – there is no written rule or regulation that specifically outlaws it.

However, the board told BBC Sport last month boxers and their teams are verbally advised not to use a sauna as a way to “rapidly lose weight” and it is seen as an “inappropriate means” to cut weight.

It means the sauna use was being investigated in regards to Eubank’s weight cut and how much weight he might have lost using a sauna.

The Southern Arena Council met on July 1 and Eubank was represented by another “licence holder”.

As well as receiving a fine, Eubank also got a “severe reprimand” on his file after he was an hour late to the official weigh-in in fight week.

The board’s original statement, released on the ‘notices’ section of their website, external last Friday, did not mention the use of a sauna, the evidence they heard or how their decision was reached.

Eubank Jr’s team and promotion company Boxxer did not respond to a BBC Sport request for comment.

After handing over his weight fine to Benn and being penalised £100,000 by the board for slapping an egg across Benn’s face, Eubank has now lost a total of £485,000.

Eubank must pay his latest fine before he fights Benn in their rematch on 20 September in London.