At times of extreme weather there are still thousands of homeless people on the streets in dangerous conditions - here is what you can do if you see someone.

In the last 48 hours, StreetLink has received nearly 4,000 alerts from the public reporting rough sleepers, the highest numbers since December 2012.

StreetLink is a non-profit organisation run by Homeless Link, the national membership charity for homelessness agencies, in partnership with St Mungo’s, a major provider of homelessness services.

Sleeping rough is dangerous enough without the bad weather, but when you add freezing temperatures it becomes a greater concern.

When temperatures drop to below freezing, local authorities have a duty to offer emergency shelter to all those sleeping rough, and you can help.

StreetLink is asking people to download the app onto their phones, from which you can send an alert if you are concerned for a rough sleeper's safety.

From here local outreach teams can track them down and take them to warmth, safety and shelter.

Alternatively you can call 0300 500 0914 or visit streetlink.org.uk.