4030 & 4029 pass Sellindge on 18 July 2021 with the 9O31 13:10 Paris Nord to St Pancras International Eurostar service, one of just three up trains using this section of HS1 on this Sunday. This is a real transport corridor, with the relatively new HS1 bordered by the classic third rail Dover to Ashford line, and the M20 motorway.