FEED THE HOMELESS: Make it a law in the UK for food companies to donate wasted food to the homeless

I have seen first hand how much companies who sell food, have to throw away at the end of the day if they haven't been sold. It breaks my heat knowing this food could feed so many homeless people on the street who would bend over backwards for a free meal. Especially since winter is coming up, i really believe if the government made this a law to donate unsold food, it would make homeless peoples lives just a little better in the coming dark cold months.