David Cameron said he would give London Mayor Boris Johnson "a warm welcome" if he decides to return to Parliament.
The Prime Minister told ITV News' deputy political editor Chris Ship: "I think he's got a huge contribution to make.
"Whenever Boris wants to, he'll get a warm welcome from me".
More top news
Very young children are just as likely to spread the disease as they are to catch it, a health chief warned.
Anger at the verdict in the shooting of black teenager Michael Brown has left the US deeply divided during its celebration of togetherness.
For most of the country, tomorrow is set to get off to a more pleasant start as it should be drier and brighter with the odd sunny spell.