One of the biggest corporate donors to the populist Reform U.K. party has sold almost $2 million worth of transmitters, cockpit equipment, antennas and other sensitive technology to a major supplier of Moscow’s blacklisted state weapons agency, documents show.

From 2023 to 2024, the company, part of the British aerospace manufacturer H.R. Smith Group, shipped the equipment to an Indian firm that is the biggest trading partner of the Russian arms agency, Rosoboronexport.

H.R. Smith Group donated 100,000 pounds (just under $130,000) to Reform U.K. last year, two days after Nigel Farage was announced as the party’s leader. The company is run by Richard Smith, a businessman who owns 55 Tufton Street, a Westminster townhouse that is home to some of Britain’s most influential right-wing lobbying and research groups.

H.R. Smith Group said that its sales were lawful and that the equipment was destined for an Indian search-and-rescue network. The parts “support lifesaving operations” and are “not designed for military use,” said Nick Watson, a lawyer for the company.

The records do not prove that H.R. Smith’s products ended up in Russia. But they show that, in some instances, the Indian company received equipment from H.R. Smith and, within days, sent parts to Russia with the same identifying product codes.