Brexit’s effects on UK farming have been modelled in a study released this month. Perhaps not surprisingly, the future trading relationship between the UK and the EU is crucial as to whether the overall outcomes are positive or negative.
The study was conducted by the Agri-Food & Biosciences Institute (AFBI) in Northern Ireland in conjunction with the University of Missouri, using the FAPRI-UK modelling system. It looked at three possible post-Brexit trade scenarios;
- Bespoke Free Trade Agreement (FTA) between the UK and the EU
- Default World Trade Organisation (WTO) trading conditions
- Unilateral UK Trade Liberalisation (i.e. a ‘cheap food’ policy)
The chart below summarises the effect on overall revenue for key sectors of UK farming – it combines both price effects and production changes.

The FTA option assumes that the EU and UK retain tariff-free access to each other’s markets after Brexit, and also that there are no changes in tariffs between the UK and the rest of the world. Cost increases equivalent to 5% of the commodity price are included to cover additional trade-facilitation costs between the UK and EU such as customs paperwork, inspections, and delays at ports. It can be seen that, overall, the changes in outputs under this scenario are all small – the largest being only 3% for beef.
Far bigger changes will occur if no deal is concluded between the EU and UK. In this case, trade between the two will default to being under WTO Most Favoured Nation (MFN) status. The EU will apply its normal tariffs onimports from the UK, and it is assumed the UK will reciprocate by charging the same tariffs on EU imports. Again, no change in trade arrangements between the UK and the rest of the world are assumed, but trade facilitation costs go up to 8% of a commodity’s value. Broadly, under this scenario, the value of UK output rises in those sectors where we are a net importer (dairy, pigs, poultry etc.). This is because the domestic market no longer has access to European imports which are replaced by domestic production. Both market prices and production levels rise. Conversely, in sectors in which the UK is a net exporter (notably sheepmeat) there is a dramatic decrease in output value as prices and production falls. Whilst, superficially, this potentially looks good news for UK farming (unless you are a sheep farmer), the model does not cover ‘second-order’ effects. The increase in prices for various commodities will have an effect on consumer demand. In addition, over time the UK may well start to conclude FTAs with other countries (New Zealand, Australia, Brazil etc.). These are likely to open-up the UK agricultural market to more competition with the competitive environment looking more like the ‘liberalisation’ one.
The final scenario assumes that the UK unilaterally opens up its agricultural markets to both the EU and the rest of the world, not levying any tariffs on imports. It would still be subject to EU tariff when trying to export to Europe however. This can be considered as a ‘cheap food’ policy. Under this scenario, all sectors suffer considerable revenue falls as the UK market is subject to least-cost competition from all around the world.
The authors of the report note that the final outcome may well be a hybrid of the scenarios offered. The report does quantify the wide range of outcomes and reiterates why agriculture needs to make itself heard in the negotiation process. The full report can be found at https://www.afbini.gov.uk/news/afbi-releases-report-post-brexit-trade-agreements-uk-agriculture