An increase in the number of children aged five to 14 falling ill means the flu season has officially begun. Doctors say anti-viral drugs should be given to people at risk of developing complications from flu - and it's not too late to have a vaccination
More top news
The Labour leader did not say whether he would maintain Britain's nuclear deterrent programme.
Ukip leader Paul Nuttall also said he would want to get rid of Sharia courts.
Over 40,000 people picked up their packs to take part in the annual marathon in the capital.