Of course not....And certainly not in the case of Ryanair who have a habit of employing you in, say, Manchester and two weeks later sending you to live and work in, say Bucharest whether you want to go there or not. You won't go ? Then it's bye-bye.
Hence their need for the EU Residence or Work Permit. So in other words, the requirement basically excludes UK passport holders unless, like myself, they already have Residency Approval in an EU country although that may change - I've no idea.
Probably this sort of stuff will become more frequent and, let's face it, reciprocal until the politicos sort out something better than exists since last week.
On the other hand, how will the UK courts react if, say, British Airways or SportsDirect post ads for jobs for those ' who have the right to live and work in the UK ' only.
No doubt some smart arse Human Rights Lawyers are already waiting with baited breath for the chance to sue BA and / or SportsDirect for Discrimination.