All churches in the UK have a service of rememberance for fallen soldiers, originally it was for those who died in WW1 but in the alst 20 years it is for those who ahve died or lost loved once in all conflicts. It isn't really a national holiday as such becusd it is always on a sunday which is most people's day of anyway. Al Christian churches have their own services, usually in the church then they march to the Cenetaph (war memorials in the centre of most towns and villages for those who died in WW1 also known as the Great war). It is meant to be asolmn occaision but a lot of people turn out to watch the marching because there is usually the mayor, the senior police officers, the Scouts, the Territorial Army (a reserve force a bit like your National Guard), cadettes and sometimes Masons as well as veternas.
It is national but don't forget that in the UK "Officialy," chruch and state are not separate as they are in the USA so the Church of england is the religious arm of the state basically and other denominations follow suit.
It is national but don't forget that in the UK "Officialy," chruch and state are not separate as they are in the USA so the Church of england is the religious arm of the state basically and other denominations follow suit.