I was only 8 at the time, but my aunt was in hospital with salmonella at the time. A prawn mayo sandwich (from M&S, no less

) was to blame apparently, according to her.
However, my DN specifically mentioned cholesterol. To be honest, I find the whole NHS approach to diet very bizarre when it comes to advice and what they serve in hospitals to people with specific health conditions. In terms of this thread and "blame", I don't think the health/nutrition advice over the past 40-50 years has covered health services in glory, and I think the wildly changing and inconsistent advice has a part to play in the blame for current health trends - if for no other reason than it's made a lot of people ignore what good advice there is.