The team’s trophy parade was a unique spectacle, giving hundreds of thousands a chance to enjoy a sporting success, others a chance to moan about congested streets and all the litter left behind… and, for the local MP, a new opportunity to make a gaffe, says Ava Vidal W hen hundreds of thousands of Arsenal supporters packed onto the streets of north London this weekend to watch the squad parade its Premier League trophy , not since the Olympics have so many ordinary people been keen to come