I’ve mentioned in the last couple of days that the NI Protocol only keeps NI in the Single Market for goods, not services. So no deal has an impact on some service business exports & they revert to WTO terms. Stormont’s Dept for Economy commissioned some useful work on this.
It’s tricky to easily express the impact that no deal has on services because it’s not about tariffs; instead it’s a range of non-tariff barriers which differ from sector to sector, particularly around how & where you deliver the service.
So this research uses the OECD’s Services Trade Restrictiveness Index methodology to express the new service barriers as tariff equivalents.
It found the tariff equivalents across all assessed sectors would increase by an average of 14.5% under no deal with the biggest increases in computer services, courier services and air transport.
Summary here https://www.economy-ni.gov.uk/sites/default/files/publications/economy/STRI-research-DfE%20summary.pdf
As an additional point it will help enormously to have an Irish passport if you have to travel to the EU to deliver the service & therefore avoid this sort of stuff https://www.theguardian.com/business/2020/dec/10/uk-business-travellers-to-eu-face-fines-over-post-brexit-permits