If I were ex-TCX today I would look at RYR/EZY/WZZ. Those are the ones to survive in the long run besides some of the regionals (with good network) and the usual suspects (IAG/LH/AF-KLM). I doubt if there is any future for the charter/leisure operators (in the long run). Brexit or not, the UK will still remain part of the European and Trans Atlantic aviation market, which is something to consider when looking for a secure job (if anything like that exists these days...).