There will be a document when the charity was originally formed which explains how its set up and run. It may even have separate rules. The founders may have started it by "guarantee", which is their liability should it fold as they are members rather than owners.
Hi Grace
BTW Abacus is called Johnny (on his signature bar, unless you are accessing this from a mobile phone when you can't see that).
Each charity will be set up in a different way, but each should have some kind of governing document (might be called by another name) which will lay down the rules of that particular charity including who will sign off the Annual Accounts.
I've enclosed a link for some useful information, plus it is also worth having a look at the Charities Commission website.
