700119 and 377450 passing through platform 3 at Horley station on 14 jan 2022.

700119 is a Thameslink class 700 and 377450 is a class 377 Southern train. The British Rail Class 700 Desiro City is a dual-voltage electric multiple-unit passenger train capable of operating on 25 kV 50 Hz AC from overhead wires or 750 V DC. 115 trainsets were built between 2014 and 2018, for use on the Thameslink network, as part of the Thameslink Programme in the United Kingdom. As of 2021, they are operated by Govia Thameslink Railway. The British Rail Class 377 Electrostar is a British dual-voltage electric multiple-unit passenger train (EMU) built by Bombardier Transportation on its Electrostar platform at Derby Litchurch Lane Works from 2001 to 2014. All are operated by Govia Thameslink Railway and Southeastern in South East England.