Why has ULEZ got people so riled up?

Have you heard of ULEZ?

Well, if you live in the capital, it's hard to miss.

It’s the Mayor of London’s controversial green policy that’s got the greenlight to clean up the air.

So why are people so riled up about it? Will other cities follow suit? And why has it become a battleground for the next general election?

ITV News Political Correspondent Simon Harris tells Duncan Golestani What You Need to Know…