The messages left by David Cameron, Ed Miliband and Prince Charles have been tweeted by Channel 4 News correspondent Ciaran Jenkins.
The Prime Minister's note reads: "Your most enduring legacy is our liberty - David Cameron."
Mr Miliband's says: "From the leader of the Opposition".
The note attached to the wreath laid by Prince Charles says: "In everlasting memory - Charles."
Liberal Democrat leader Nick Clegg's message on his wreath read: "From the Deputy Prime Minister".
As the Lights Out event to remember those who fought and died in WWI happened last night ITV asked our viewers what they did to take part.
Lights on some of Britain's most famous landmarks were extinguished between 10pm and 11pm to remember those who died in WWI.