@Marino.g - I work in the food industry too. I work for a national manufacturer providing supermarkets with cupboard staples and demand has literally been higher than Christmas (which is our normal peak). We have operations in the South West so you may have visited one (or more) of our sites
In terms of the two meter rule - employees should be protected, and being a food manufacturer is not an exemption to the 2M rule as far as I'm aware?
Our sites are highly automated, but where there are employees working on a line they are usually shoulder to shoulder. We now have perspex screens in every such case (so it is cramped but there is still physical separation). We also have lots of floor markings like you see in the supermarkets to give visual representation of the 2M distance that is required between employees around every site.
If you are worried or concerned, you could contact the HSE - they are taking this seriously and I know that more than one of our sites have had visits from the HSE recently to observe our precautions. We haven't been given any guidance by the HSE (because we are in compliance) but they are doing inspections and do expect distancing rules to be followed by food manufacturers. If we hadn't taken measures to facilitate distancing, you can bet they'd have set a date for a follow up visit!