If it saves just one life during the forecast minus degrees, it can only be a good thing.
http://www.streetlink.org.uk/
StreetLink is a website that enables the public to alert local authorities in England about rough sleepers in their area. This service offers the public a means to act when they see someone sleeping rough and is the first step someone can take to ensure rough sleepers are connected to the local services and support available to them. The service is funded by Government and is part of their commitment to end rough sleeping.