Veterans from the D-Day landings are being hosted at a lunch on board HMS Belfast today.
The ship has only recently been re-opened to the public after the gangway collapsed into the River Thames in November 2011.
More top news
London City Airport is closed after reports of a "chemical incident", London Fire Brigade said.
Council leaders today called on the government to provide extra money to help resettle the youngsters in the capital.
An eyewitness said: "It was very unnerving. It was just after 12pm and there were suddenly police vans and cars everywhere."