Complex sentence: He pretended to be the Prime Minister when Eric and Ernie were carol-singing in front of 10 Downing Street; he actually made them give him money and finally coming out to say "paid, at last!".
Split into simpler sentences: He pretended to be the Prime Minister when Eric and Ernie were carol singing in front of Number 10 Downing Street. He actually made them give him money and finally coming out to say "paid, at last!".