concertmaster of a BBC symphony orchestra?

Question

He does not come out to a concert more than these three months
I want to know whether he still remains in the position
（Of a BBC symphony orchestra almost hear all concerts via a net of BBC Radio 3）

How would he whom mr.stephen bryant who appeared in a member list of an orchestra of HP for these approximately 3 months did not appear in a concert and invited a guest leader and played do it
(I live in Japan, but hear a concert of a BBC symphony orchestra with BBC Radio 3 via a net radio every time)
Friend and I of me are his fans.

Answer 1

I think there are different conductors for the BBC Proms.