Boris Johnson: I don’t oppose the mansion tax because I’ll have to pay it 10:39 AM Facebook Twitter Boris Johnson is out campaigning in Hampstead this morning. Boris Johnson tells CNJ that whether he himself will have to pay the mansion tax is irrelevant to his opposition. He's touring Hampstead. — Richard Osley (@RichardOsley) May 1, 2015 Boris Johnson walking through Hampstead earlier, passer-by shouted 'Bulla bulla bulla' at him. — Richard Osley (@RichardOsley) May 1, 2015