"We welcome Jobbik to London but we won't be in attendance today as it is a Hungarian affair."
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The bizarre combination was filmed as it raced along Whitechapel High Street in East London.
The mayor claims America's Inland Revenue Service has hit him with a bill for unpaid tax on the sale of his home.
The tin was taken at around 4pm on Saturday, 8 November in The Parade, Coulsdon Road in Coulsdon.