SIR – In reply to Bob Churchill (July 24) what a pity he didn’t mention that the introduction of blood transfusions was delayed more than 200 years because of misleading results of animal tests. Corneal transplants were delayed 90 years for the same reason.

What cures today are being delayed by animal research?

The giving of licences seems to be on an anything goes basis when you look into the pointless and painful experiments approved each year.

I can certainly say that I do want vivisection outlawed.