"Margaret Thatcher in Heaven" joke

Margaret Thatcher dies and strolls up the pearly staircase to the pearly gates,
where she is confronted by St. Peter, brandishing a clipboard. "Name," says St.
Peter.
"Margaret Thatcher," she replies.
St. Peter checks through all the lists on his clipboard but cannot find the name
of the former British leader. "I am sorry," he says, "you cannot come in. Your
place is downstairs, in Hell. Mrs. Thatcher turns and walks down the stairs.
A short time later the phone rings. St. Peter answers, and a voice says, "Hello
Peter, it is the Devil speaking. You will have to take that bloody woman after
all - she is only been here for ten minutes and she has closed half the furnaces
to reduce capacity."