I have trawled the internet, reading official articles about probable food price rises after Brexit, although some have already risen such as bacon, pork and beef. In this country, we now only produce 30% of the food that we need (such a change from post war production).
Here are the list of goods expected to rise:
Butter, cheese - foreign and oddly enough, cheddar, yoghurt up by 8%
Beef up between 5% - 29%
Other meat products up 6%
Pork and bacon already up 20%, more to come
Chicken up 25%
Fruit and vegetables, including potatoes, up by 4%
Tomatoes up between 9% and 18%
Broccoli up 10%
Cod up 18%
Bread (non-wheat and oat) up 2%
Some of the increases are due to increased feed and labour costs. We have already seen this year, orchards of fruit left to rot due to shortages of foreign pickers. China, after severe flooding, have bought a good portion of our pork whilst we continue to import, crazy or what.
Some items that are sourced outside of the EU may rise but not so much. These include Quinoa, Rice, Beans, Pulses etc.
It is recommended you source British flour, oats, white sugar in particular, local salt, cider vinegar, and mustard. Buy British afterwards, when possible.
EU products to source now are olive oil, pepper, pasta, spices, herbs, tomato paste and tinned fish. There are probably far more but I couldn't find anything about those.
If we leave without a customs agreement, things could get very bad with severe delays both in and out of the UK.
Major supermarkets have already siad that due to modern computerised stocktaking, and day to day ordering from the global economy, they are incapable of storing food too long in advance.
Some drug manufacturers have already started stock piling, as drugs are a darn site easier to store than food.
I made the decision this year to increase out soft fruit production. Tinned fruit in juice rather than syrup, is recommended to store long term.
Although I had started my Brexit storage, I have used some of it up. I shall now start again and find somewhere different to store it for use later on.As prices could rise between March and June, I shall make sure that a lot of what I store will be for the summer and autumn months.