
At the forefront of dissent will be anti-monarchy campaign group Republic, which will hold a Not the Royal Wedding alternative street party in central London during the day of events at Westminster Abbey.
Republic will be "celebrating democracy and people power rather than inherited privilege".
The group is also behind a similar event at a pub in Manchester, and is publicising anti-monarchy plays to be performed in Cardiff and South Shields.
'Publicity stunt'
Graham Smith, spokesman for Republic, told the BBC News website: "We need to get across the fact that the whole country isn't interested in the royal wedding and a sizeable minority...