The A2102 is an urban A-road in St Leonards-on-Sea, essentially part of Hastings.
The road starts on the A21 at a modified fork where that road bears left from London Road into Bohemia Road. The A2102 continues south along London Road, although it has never been the A21 (it was the B2094 for many years, however).
The road continues south through the suburbs before passing over the top of the tunnel immediately west of St Leonards Warrior Square station. It runs through what passes for St Leonards town centre before descending steeply towards the sea. One block inland the road joins a one-way loop. The road ahead is for northbound traffic only and so southbound traffic bears left then right to end one block further east; there are two sets of traffic lights on the A259 to cater for the A2102.
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