This paper reviews the research carried out on the hot-mix recycling of bituminous materials over more than a decade in the UK. Results from trials on public roads and full-scale accelerated load testing of recycled roadbase in the TRL Pavement Test Facility are summarised and discussed. Hot rolled asphalt wearing course has been recycled in-situ using the Remix method with up to 80 per cent of the original surfacing material in the mix. In off-site mixing plants, recycled bituminous roadbase has been produced with up to 60 per cent of reclaimed material in the mix. Their performance in the road has been assessed by measuring longitudinal profile, transient deflection, depth of rutting, surface texture and resistance to skidding. Performance-related laboratory tests have also been carried out. In general, the trials indicate that the performance of recycled materials is as good as that of equivalent conventional materials. The results of the research have been implemented in the UK Specifications.