The British Rail Class 707 is an electric multiple unit passenger train built by Siemens Mobility on its Desiro City platform, and operated in England by Southeastern.

[14] The rest of the fleet was delivered with just 750 V DC shoegear for use on third rail electrified lines, but all will have the ability to be modified for dual-voltage use if required in future.

The final twelve were expected to transfer to Southeastern by early 2022,[26] but in January 2022 South Western Railway announced that continuing delays to its Class 701 programme had resulted in it extending its lease on the remaining 12 units until late 2022.

[26] Southeastern branded them City Beams, and deployed them on shorter-distance services from London Cannon Street and Charing Cross stations to Gravesend, Dartford, Sevenoaks, and Hayes.

[32] Passengers praised the new trains for providing air conditioning and charging points for mobile devices, but expressed dissatisfaction that they were not fitted with toilets.