Guido Fawkes reports https://order-order.com/2018/02/20/bbc-ask-corbyn-if-hes-a-czech-spy/ that the BBC have finally asked Jeremy Corbyn about the Czech spy claims:
'The BBC have finally jumped on the Agent COB story, only to blow it with a stupid question. Rather than ask something pertinent about what information he handed to a communist spy, BBC finance reporter Steph McGovern went with: "Are you a Czech spy?" He replied: "No".'
A) The claim being made isn't that Jeremy Corbyn was a spy, but rather that he met with and gave information to a Communist State spy.
B) The claim isn't about the current time but the past.
So the question shouldn't have been "Are you (now) a Czech spy?" but "Were you (then) a Czech informant ?"
Was this wording of the question a mistake by the BBC? Possibly, but more likely a deliberate ruse to allow Jeremy Corbyn to answer no and deny what wasn't the actual accusation. Once again is the BBC operating as the propaganda arm of the Labour Party.