Police are preparing for one of their largest operations of the year so far as Arsenal fans from across the world descend on north London to see their team’s victory parade. The Gunners will be celebrating after securing their first Premier League title in 22 years , and could also lift the Champions League trophy if they beat Paris Saint-Germain in Saturday’s final. Behind the scenes, officers and emergency services have been working together for months in preparation for the festivities, with the club expecting a “huge” turnout of fans. More than 500 officers will be deployed across the mammoth operation in Islington on Sunday, with specialist search and drone teams also out in force. Arsenal will celebrate lifting the Premier League trophy (Getty) The event is also expected to cause significant delays on public transport as several Tube stations and major roads are closed throughout the day.…