Labour leader Ed Miliband has described Boris Johnson as a "good showman but not a very good mayor".
Speaking to ITV London, Mr Miliband said that while the London Mayor was a "fun guy" it was not enough to be a good Mayor.
However, the Labour leader insisted comedian Eddie Izzard - who has announced his intention to stand as London Mayor - was welcome to stand for Labour in the 2020 contest.
More top news
The tour of European capitals was timed to coincide with the start of the Article 50 process to exit the EU.
The Football League will introduce the project if the family of PC Keith Palmer supports the idea.
After the terror attacks, Londoners are starting to reclaim Westminster Bridge - proof already that life is returning to normal.