From me:

I've decided to ride 50km round Marham on the 4th and to raise some money for RAFA, They do such amazing work to support armed forces individuals and families so please spare a penny if you can, it's tough to find disposable income right now, but that's also making it even harder for these charities to operate and support those who need it. 

From the event:

We are encouraging everyone taking part to raise money for three very worthy charities close to the hearts of personnel at RAF Marham and other military bases nearby. All fundraising proceeds will be split between the Royal Air Forces Association (60%), Royal Navy and Royal Marines Charity (30%) and United States Air Force Aid Society (10%).