units until September 2009 was covered by the temporary cascade of a number of Class 350/1s to Southern from London Midland, which operated services between East Croydon and Milton Keynes. In September 2011, it was announced that Southern had begun the procurement of 130 vehicles, due to delays in the procurement of new Thameslink rolling stock that would prevent transfer of the 377/5s in time for the December 2013 timetable change. The contract was awarded to Bombardier in December 2011. The additional eight five-car units (from an option in the contract for 40 additional vehicles) are dual-voltage and known as Class 377/7. In December 2011, three Class 377/2 units were transferred from Southern to First Capital Connect to allow more 12-car services to operate. During mid-2013, the first of the new Class 377/6s arrived from Derby for type testing, and since October 2013, these units have been used in passenger service, initially in peak-hour services on the Sutton and Mole Valley lines, Epsom Downs Branch, Tattenham Corner Line and the Caterham Line. Southeastern received 25 Class 377 units (the 23 Class 377/5s and 2 Class 377/1s) in recent years, as specified in Department for Transport documents, published in September 2013, relating to the new combined Thameslink, Southern and Great Northern Franchise. Refurbishment Porterbrook is funding the £55 million five-year Project Aurora programme to refurbish 214 Class 377 Electrostars operated on Southern services. The work started in 2020 and is being done at Selhurst depot. 377 430 was the first unit to be completed in early 2021. Changes include the installation of screens showing live GTR and London Underground service information, the provision of USB and power points, energy-saving LED lighting and a passenger-counting system which will enable GTR to analyse how busy individual services are. Current operations Southern Mainline and Redhill Routes: London to Brighton, Horsham, Reigate, Tonbridge, Eastbourne, Ore, Portsmouth, Southampton, Littlehampton and Bognor Regis East Coastway: Brighton to Eastbourne, Hastings, Ore and selected workings along the Seaford branch line West Coastway: Brighton to Portsmouth, Littlehampton, Bognor Regis and Southampton (selected workings) West London Route: Clapham Junction to Watford Junction Oxted Line: London to East Grinstead Outer Suburban services: Central London to Tattenham Corner, Epsom, Horsham, Dorking, Guildford Inner Suburban services: Central London to Caterham, Sutton, Epsom Downs, West Croydon, Beckenham Junction via Crystal Palace Southeastern In December 2016 Southeastern (Govia) received 8 units (377501-377508), transferred from Thameslink. In