The King's Army Annual Whitehall Parade, 31 January 2010

If you are up in London then maybe you should go and cheer them on.

The ECWS page where there is more info and photos says

Every year, on the last Sunday in January, the King's Army (the Royalist part of the English Civil War Society) is privileged to be allowed to commemorate the execution of King Charles I with a parade along the route taken by the King from the St James' Palace to his place of execution.

The event takes place on Sunday, 31st January this year. The Army will assemble in The Mall in front of St James Palace from 11.00am. Starting at about 11.30am, the Army will proceed to march at funeral pace along The Mall, down Horseguards Road and onto Horseguards Parade itself. On this spot there will be a short service and ceremony and a wreath of remembrance will be laid at the Banqueting House.

The parade then returns to St James' Palace at a normal marching pace, with drums beating and colours flying via Admiralty Arch and back along The Mall.

This colourful commemorative parade has been staged every January for almost 40 years and has become a popular feature in the annual events calendar of England's capital city.