Just caught this on Look North (BBC). I was looking for the video link but not there.
BBC News - Bridlington shops bleach food to stop homeless foraging
To summarise, a Bridlington councillor slept rough on the streets one night (a plight of the homeless thing) and was brought food that had been dumped by shops & made inedible, so it couldn't be scavenged.
Frozen food chain Iceland said staff at its Bridlington branch had occasionally "intimated" that the waste was treated, but this was against company policy.
It added that it did not offer expired food to charity because it could not be guaranteed as safe for consumption.