It looks like business as usual in many ways so nothing to stop other EU carriers opening bases here, pushing existing struggling UK carriers closer to the brink and generally undermining the UK resident pilot market.
This isn't really the issue you might suppose. Very few carriers of size are purely UK-owned these days. British Airways is a division of multinational IAG. TUI is a pan-European company ultimately owned in Germany. Ryanair UK, EasyJet (UK), Wizz Air UK are all divisions of pan-European companies. Virgin, Jet2 and Loganair are (
AFAIK) predominantly UK-owned. Aurigny and Blue Islands are Channel Isles. Eastern, Titan, Jota, 2Excel and Skybus I presume to be UK-owned too. But in terms of fleet numbers and crew, all of those added together don't come close to the size of those large multinational companies. The principal UK freight carriers are mainly multinational operations as well. Most of those familiar 'struggling UK carriers' are in reality 'struggling multinational carriers' already.