The food had been prepared by HL Foods in Long Sutton, Lincolnshire, for supermarket giant Sainsbury. Mr Howard had bought the Sainsbury's own-brand baked beans in November last year at the New Cross branch in south London.
Lewisham Council charged HL Foods under the Food Safety Act. On 15 December, Greenwich magistrates fined the company, pounds 8,000.
A Sainsbury's spokesperson said yesterday: "Food safety is one of our top priorities. Any foreign object found in our products is taken very seriously and as soon as we knew there was a problem we launched an investigation with HL Foods." More than 12,000 tins from the same batch have been removed from sale.
The mouse had been boiled in the tin. No one knows exactly how it got in, but since bean starch was found in its stomach during the investigation, clearly greed was its downfall.