It's going to be a bit difficult if you haven't got a Charities Registration Number when they ask for it !!
Do the free hours include calls to 0845/0870 numbers as well or is it purely to Geographic numbers ?
I am presently looking for a good phone deal for the registered charity that I support so I would appreciate more info please.
If you don't wish to post it yet, just send me an
instant message
so that I can pursue it further, then when you're happy add the info to this thread later.