Graeme Wall wrote:

It is an urban myth that Doctor Who ever went out live.

It certainly went out live in the very early years

Oh no it didn't (and I've read more than enough books on the topic to
prove it). 'Quatermass' and various plays went out live but 'Doctor
Who' never did.

I must check with a cooleague who worked on the early episodes. Can't
contact him at the moment as he is somewhere in Brazil!

I wouldn't believe everything you read in books about Dr Who...

Given that many are written by researchers who have accessed the BBC's
files, checking and cross checking the studio dates, internal memos and so
forth. The recording schedules are in existance, the tape usages are, a few
of the early episodes transmitted from film recordings still exist in the
Film Library. The evidence is overwhelming.