Nigel Farage has said he expects Parliament's standards commissioner to rule against him when the investigation into a £5 million gift he received is complete.

The Reform UK leader made the remark during an appearance on the BBC's Sunday with Laura Kuenssberg programme on 8 November, in his first public comments on the inquiry since he was interviewed by the commissioner in September.

Daniel Greenberg, the Parliamentary Commissioner for Standards, is examining whether Mr Farage should have declared the gift, which came from Christopher Harborne, a crypto billionaire. Mr Farage was interviewed by Mr Greenberg for around half an hour in September as part of the inquiry.

Under the rules that applied when Mr Farage became an MP, new members of Parliament were required to register gifts worth more than £300 received in the previous 12 months, unless the gift "could not be reasonably thought by others" to relate to their political activities.

Asked about the interview on Sunday, Mr Farage said: "Under the rules of Parliament, if I even answer your question, I will receive a letter of rebuke from the standards commissioner."

He added: "This is the farce of it: You can say what you like, people can write what they like, I'm not allowed to respond."

Asked directly whether he expected the commissioner to find against him, he replied: "Do I think the establishment would find against me, the leader of an insurgent party? What a question to ask."

Mr Farage has previously said the gift was a private matter and had nothing to do with his political activity. He has also said he gave the commissioner a copy of a contract drawn up with Mr Harborne describing the £5 million as a gift. The commissioner has not yet published any finding, and the inquiry remains open.

The gift has become part of a wider debate about money in British politics. Mr Harborne is one of two crypto-billionaires who have donated £72 million to Reform UK, with matching £36 million gifts from Mr Harborne and Ben Delo. The scale of the donations has renewed calls for a blanket cap on political donations, going further than legislation aimed at restricting donations from overseas sources.

Mr Harborne was based in Thailand, but was reported in June to have registered to vote in Hampshire.

The gift inquiry is one of the questions facing Mr Farage over his financial affairs. The Times has reported that the commissioner is also examining benefits he received from George Cottrell, a convicted fraudster and crypto gambler, including security, transport, staff and accommodation.