Boris Johnson said: "Londoners have to be a little bit patient; they have to recognise that this thing (the Olympic Stadium) was not built to be the kind of omni-purpose, world class stadium capable of hosting premiership football that it should be and there's a very clear choice for us all.
"Do we want to rush ahead with a reopening or do we want to go on with the adaptations that will deliver a world class facility?"
More top news
At least two people have suffered minor injuries but the cause of the blast is still unknown.
A songwriter from Harlesden who wrote a track for Beyonce's Lemonade album has been nominated for a Grammy Award.
Sadiq Khan issues the first 'very high' air quality alert since becoming Mayor