In a statement on Monday, Charles Hurst said the vehicle had not been supplied for anyone individual and that the tyre contract was awarded by the government's central procurement agency rather than directly by the Fire Service.

BBC: NI Fire Service paid unapproved bonuses to three staff

"Charles Hurst is one of four appointed suppliers to NIFRS and was subject to precisely the same tender process by the procurement team of the central purchasing agency as all potential bidders, " the company said.

BBC: NI Fire Service paid unapproved bonuses to three staff