Christopher Harborne, the Thailand-based crypto investor who has given millions of pounds to Reform UK, would be unlikely to get around a planned cap on overseas political donations even if he has registered to vote in the UK, it is understood.

Harborne, who also gave Nigel Farage, the Reform leader, £5m as a “gift”, has registered to vote in Hampshire, the Times reported, with a spokesperson for the billionaire quoted in the paper saying that he had decided to become a “registered voter in the UK”.

The move could be viewed as an attempt to help Harborne get around planned changes to the political donations system, which could put a £100,000 annual cap on Britons based abroad, as well as other measures such as blocking donations…