Winter fuel allowance

My esteemed father has recently reached the venerable age at which the
Government, god bless'em, sees fit to give him a Winter Fuel
Allowance.

I am curious about how this works.

Does a man knock at the door, take his hat, and say, "Hello, I'm from
the Government, I'm here to help"?

And then, proferring a small lump of charcoal, say: "Here is this
month's allowance; don't burn it all at once."

Is the allowance delivered in cash? Or, if in fuel, does the recipient
have a choice as to the kind of fuel?

Can he insist on his inalienable right to the peaceful development of
nuclear weapons, err, I mean energy, and expect 100 grammes of
enriched uranium through his letter box every month, complete with a
"with compliments" slip signed T. Blair, Mohammed El Baradei, and
President I'madinnerjacket or whatever his name is?

(Of course, we, the good guys, do have peaceful, cuddly nuclear
weapons. We don't use them, you see. We just keep them as a nice
little fluffy shield so that we can get on with the business of
bombing other people with 'conventional' weapons without fear of
serious reprisals).