The Affair of the Spanish Marriages has the result of Queen Victoria marrying Princess Victoria to the son of Louis Phillipe but he's deposed, the deposition and abolition of the French monarchy has a rolling effect catalysed by Peterloo Massacre twenty years earlier - revolt is in the air and the national government that forms must pick a side, knowing the way the wind is blowing they pick the side of the revolution and replace Lord Melbourne as Prime Minister in an attempt to satiate the masses with Thomas Attwood, vocal supporter of the Chartist movement, intending he will be a puppet for the national government.
Victoria and her children are exiled, seeking sanctuary in Belgium with King Leopold or Hanover with her Uncle Ernest and the Duke of Wellington becomes an honorific head of state.