There was a tough – but incredibly important – watch on BBC Three on Tuesday night. We saw Professor Green present a documentary tackling the issue of homelessness in the UK.

He visited Manchester first, where we met Luke, 20. He’s been living on the streets on and off for five years. And we found out almost half of homeless people end up on the streets under age of 21.

Professor Green
(BBC/Antidote Productions/Duncan Stingemore)

On the streets, young people are exposed to prostitution, crime and drugs. But drugs were the main focus of Luke’s struggle – particularly “spice”, a legal high. Luke admitted to Professor Green that it’s “not nice” – but it’s a coping mechanism.

It was explained how “spice” is a a synthetic cannabis. But Professor Green was shocked by its effects, describing how it seemed like a much harder drug. When Luke was “out of it” for ten minutes, the singer described it as “like watching someone slip out on heroin”.

professor green and luke
(Screenshot/BBC 3)

And Twitter couldn’t come to terms with how something so terrifying is legal.

There was a moving moment when we saw that Luke had moved into a hostel, and he seemed so proud to show Professor Green round.

professor green
(Screenshot/BBC 3)

But he admitted to dabbling in drugs still. And after an argument in the hostel, he said he wanted to go into town to get some “spice”. And again, Twitter was angered by the availability of the drug – and found it hard to watch its effect on Luke.

As well as being shocked by other people’s stories in the show, there was also a statistic that completely blew viewers’ minds.

The show ended with us finding out Luke’s friend – who was also living on the streets of Manchester – had been killed. And not many people could hold their emotions back.

sign with rip daniel on and a tent infront
(Screenshot/BBC 3)

Meanwhile, many people were also tweeting how they thought Professor Green did an amazing job presenting and dealing with the issue. In fact there was A LOT of love for the singer.