Is it true that, a few decades ago, oxbridge professors and lecturers had two votes in general elections ?

Originally, it was one vote not per person, but per property. So if you had a house in, say, Canterbury, and a house in Dover, you could vote in both constituencies. Some of this remained after the reforms of the early 20th century, and until a few decades ago both Cambridge and Oxford universities were individual constituencies, which sent two MPs to parliament. Anyone who was a graduate of either university could vote as part of this 'constituency'. This was abolished in 1950.