You also pay a fair bit to the private company running the event for the privilege of taking part.
Taking their Edinburgh to London ride as an example.
It costs £190, to be fair the support looks comprehensive.
But there was just as much support on the London Edinburgh London (LEL) audax which cost, if I recall, £175.
In other words, the Help for Heroes ride is more than twice the price of LEL.
http://www.helpforheroes.org.uk/get...cling/edinburgh-to-london/how-we-support-you/