Just a word of caution.

http://dec.org.uk/

is apparently perfectly legitimate.

However, the donate box does not require the usual confirmation "are you
sure you want to ....."
So for sake of argument you intend to contribute £10 and in error you add an
extra 0, too late, you will find you contributed £100 with no apparent
opportunity to correct your typo.

I didn't get caught out, but feel it is worth a warning (and before anyone
wonders, I didn't give a mere £10)

Jack