Like Walcot and Marshall, Lancaster trained as an architect before turning to painting. He exhibited at the Royal Academy and is represented in many public collections. He also worked as an etcher.
Marble Arch was designed by John Nash and originally stood in front of Buckingham Palace. It was originally intended that Chantrey's equestrian statue of George IV should surmount it, but this was later erected in Trafalgar Square. The Arch, based on that of the Emperor Constantine in Rome, was moved to its present position at the north east corner of Hyde Park, in 1851. Only senior members of the Royal Family and the King's Troop Royal Horse Artillery may pass through it.