Can you provide anything to back that up, other than 'Rees Mogg said so'........
I can provide one of many examples:
1) food and drink – around 79 per cent – is sourced from the EU. Any food imported from the EU post-Brexit will be more expensive
2) Sterling devaluation: devaluation of sterling post-referendum has already made imports more expensive. In the event of no deal It would devalue further
3)Our own food more expensive: A weaker sterling and other new barriers to importing from the EU could make imported fertiliser more expensive, for example.
In the long-run it is hard to see how unilateral tariff removal would offset other inflationary pressures and make food in the UK cheaper than it is now. At best prices would remain much the same. At worst, the daily shop could become noticeably more expensive.
please stop believing the lies told by politicians.
Ask yourself will Rees Mogg or you be better off after any form of Brexit?