CW247
Pilots are on the Tier 2 skilled list, as long as earning over £60k-ish for a 39 hour week (it comes out to around £30/hour).
I would assume that EU crew in the UK would include experienced First Officers at the bulk of airlines, so no need to be British.
There are (more limited) opportunities in the other direction too, although due to Ryanair's conditions, not with FR.