A340s
They're not flying alone, BA are also flying in PPE, & I'm sure others are too. Four months ago the two 340s were flying for Virgin; they were painted in the UK, they're serviced in the UK & most of their operations are into & out of the UK at the moment. The NHS staff don't give a t0ss where they're registered, as long as they're doing the job. What difference does it make to you, then?