PDXCWL45 but would easyJet ever do that? They don't operate BHX because it would eat into their BRS and LTN operation. So I personally have reservations about whether they would ever be open to doing a base from CWL. They may be tempted to do the odd GVA flight and perhaps a summer sun or single domestic (similar to what they do from BHX).
But hear me out on Jet2. They are doing really well in areas of the country where package holidays are sought after. I would respectfully assume that CWL would be just that kind of market.