Heathrow Express
From 29 December 2020, the first of twelve Class 387 units from the Bombardier Electrostar family began service with Heathrow Express, having replaced the Class 332 fleet. The units transferred from Great Western Railway who are also responsible for their maintenance and operation within Heathrow Express. The units underwent modifications prior to their introduction on Heathrow Express which included the fitting of USB power sockets, extra luggage space, work tables, on-board WiFi and HD TVs. A new Business First cabin was also included in a 2+1 configuration with reclining seats.