PM Trudeau leaves for London, Governor General and 4 former PM's are part of Canadian delegation to attend funeral for Queen Elizabeth II

Prime Minister Justin Trudeau will be landing in London later today.

Trudeau, Governor General Mary Simon and four former prime ministers are part of a Canadian delegation who will attend Monday's funeral for Queen Elizabeth the Second.

Security is high in London as world leaders begin to arrive for the funeral that's expected to draw hundreds of thousands of people to the city.

Streets around the Palace of Westminster have been blocked off with metal barricades today, with police officers from across the UK directing the crowd waiting to pay their respects to the late queen.

It's expected those now in line will have to wait 24 hours.