Great Britain Philatelic Society

one of those eternal questions! Does anyone have any information about official acceptance of bisects? A friend has a cover to Germany with a bisect of the 1d lilac all looking perfectly ok. In Part Three of the Postage Stamps of Great Britain there is mention of a 2 1/2d rate to New York cover using also a bisect but never sanctioned.
I have a 1967 letter from the BPA about an Edward VII bisect calling it simply a "philatelic joke" but what was the official stance back in the 80's?
Any information appreciated

thanks
James

Hi James. Jean Alexander has found the following reference: The Illustrated London News, December 5 1885 p.577.