Sean Bean's character John Marlott mentions that he was in the 95th Rifles. This is the same battalion Richard Sharpe served with in the Sharpe series, with Sean Bean in the title role.
A man walks through the scene whistling. The tune he is whistling is Over the Hills and Far away, a traditional English folk song which is also the theme tune to Sharpe in which Sean Bean was the lead actor.
In John Marlott's trunk of possessions is an officers jacket. It is pretty certain that this is the same Rifleman's jacket that Sharpe wore in the 'Sharpe' TV series. Also, the name Marlott is very close to Maillot whose first name was Jean. This is the name of a French officer in Sharpe's Revenge.
The medal shown in Marlott's trunk after he moves to new lodgings is the Waterloo Medal. The Waterloo Medal was conferred upon every officer, non-commissioned officer and soldier of the British Army (including members of the King's German Legion) who took part in one or more of the following battles: Battle of Ligny (16 June 1815), Battle of Quatre Bras (16 June 1815), and the Battle of Waterloo (18 June 1815).
Five guineas in 1827 is worth about 10,000 pounds in 2018.