I not absolutely sure if this is still the case but 3 wheelers used to be classified as motorcycles, from the motorcycle and sidecar days with restrictions on weight etc and could be driven on a motorcycle licence. If they are still classed as motorcycles then it could be from 2035 before the new ICE three wheeler sales are UK prohibited.

22 Plus Four KIMI
12 Plus 4 Sport OZZY
08 Roadster FELIX
06 4/4 70th LOKI
77 4/4 SEAMUS
85 4/4 MOLLY