The B314 was an urban B-road in Kensington.
It started on the A3218 Cromwell Place, between South Kensington tube station and the Natural History Museum. It headed west along Cromwell Road to Earl's Court where it crossed the B316 and then turned right along Cromwell Crescent.
After going along Warwick Gardens, the B314 ended on the A4 (now A315) Kensington High Street.
In 1961, the A4 was rerouted along Cromwell Road, taking on most of the B314. The Cromwell Crescent/Warwick Gardens remained a B-road. If this was still the B314 it would be out-of-zone but owing to its short length its number is not marked on maps. Either way, Warwick Gardens is now part of the southbound A3220 and Cromwell Crescent unclassified.