Royal British Legion
The Royal British Legion (aka TRBL, aka 'The Legion') was formed in 1921 to offer cut price alcoholic fluids to servicemen of World War One through a network of social clubs. Today, they afford an ideal forum for anyone associated with the military to pontificate about how the services were “better in their day” - much like ARRSE.
In addition, they also provide a significant amount of financial and emotional support to the 10.5 million eligible people in the UK. On a yearly basis they deal with thousands of cases, safeguarding the welfare, interests and memory of all serving and ex-serviceman. They provide a potent voice for their community (e.g. the recent 'Honour the Covenant' campaign) and are nationally recognised through their Poppy Appeal.
The RBL is always on duty.