"Lion" was restored by Rustons Diesels Ltd. in 1979-1980. New boiler tubes were fitted; the original main steam pipe was replaced; because the original plug regulator was cracked, a new one was cast and fitted; new boiler fittings, including bourdon-type pressure gauge, gauge glass and try-cocks were fitted. New wash out plugs were also provided. The front buffer beam (not original) was reinforced with channel section. Safety chains were fitted and the tender equipped with air brakes taken from a commercial HGV. The boiler certificate issued by BR was for four years.