Only if it resembled a current threat - and that disappeared once the Russians developed the AS-15 cruise missile their Bear and Blackjack bombers could launch when flying in circuit at the bases around Murmansk with more than enough range to reach the UK at low level.
We did hire it on a couple of occasions to do figure of eights around the North Sea when BA were struggling to set up their charter business - an awful lot of work for not a great deal of realistic training benefit.