>>1275865Actually, regardless of EU trade or not, all civil aircraft are VAT (sales tax for Americans) exempt, putting it in the same category as food and children's clothing.
But, actually, the main problem in aviation would be if there was no deal, the UK would no longer be a part of EASA or would be in the Single Aviation Market. The EU has decided that in a "no deal" scenario, UK aircraft and pilots would be treated as EASA certified for 12 months. However, loss of access to the Single Aviation Market would be significant, but since easyJet already prepared for this by re-registering their aircraft in Austria, the effect would be limited.
Also, it's worth noting that the FAA has agreements with EASA for mutual recognition of certifications and licenses. In a "no deal" scenario, the FAA would need decide if UK aircraft and pilots would be recognised as if they were EASA or not. If not, then some decision would then have to be made about this.
Oh, finally, there's also the possible issue of Jet-A1 shortages. While there are oil refineries in the UK, a significant amount of aviation fuel is imported. If the queues at ports as a result of "no deal" occurs, there could be aviation fuel shortages at certain UK airports (some airports, especially ones with military facilities on them have independent supplies by pipeline from refineries).