[jay]

The following is taken from wikipedia, and I'm sure wigan has a pier, not sure about weston-super-mare though

Hythe Pier Railway
Probably at the time of the building of the pier, a narrow gauge railway was constructed for use with the transport of goods. The vehicles on this original railway were hand-propelled.

In 1922 the railway was reconstructed and electrified, attaining its current form. The track is laid to 2 ft (610 mm) gauge, and is electrified at 250 V DC by means of a third rail on the seaward side of the track. The line consists of a single track with no passing loops, although there are two non-electrified sidings at the landward end.

The line is operated by two four wheel electric locomotives built by Brush during World War I (works numbers 16302 & 16307[1]). As built these locomotives were battery powered, and were used at the wartime mustard gas factory at Avonmouth. The locomotives were transferred to Hythe after the war, where they were converted to collect power from a third rail and had their batteries removed. The two locomotives are currently crudely numbered No1 & No2 on their seaward sides.

The line owns four bogie passenger cars, two of which are equipped with a driving cab at their seaward ends. In normal operation, the single train in service is made up of one of the locomotives propelling three passenger cars and a four wheel flat car for baggage. The locomotive is always located at the landward end, whilst the seaward passenger car must be one of those with a driving cab. The line also possesses a four wheel oil tank car, which is used to carry fuel to the Hythe ferries.