If an unfamiliar man approached you in the street, what would you do? It's a sad fact, but many of us would be sceptical of his motives and either make a swift diversion or at the very least plead silently "please DO NOT speak to me".

But would you feel differently if you knew the person actually wanted to do you a favour? Maybe. Or, perhaps the more cynical among us would also view this with caution. Who can blame us, really? "Can I help you with anything?" is a fairly unusual question from a stranger.

But, this is exactly what London-based maths tutor, Joe asked in a social experiment which saw him approaching as many Londoners as possible. In a clip filmed by Action Productions for Kindness.org (a charity that encourages people to take part in and film acts of kindness), Joe walks the streets of London asking the same question: "Can I help you with anything?"

“Can I help with anything?” See how Londoners react to random acts of kindness