I have the following if anyone is interested

Journal of the British Interplanetary Society
Vol 11, No 1 (Jan 1952)
Vol 11, No.2 (March 1952)
Vol 11. No.3 (May 1952)
Vol 11, No.4 (July 1952)
Vol 11, No.5 (Sept 1952)
Vol 11, No.6 (Nov 1952)
Vol 12, No.1 (Jan 1953)
Vol 12, No.2 (March 1953)
Vol 12, No.3 (May 1953)
Vol 12, No.4 (July 1953)
Vol 12, No.5 (Sept 1953)
Vol 12, No.6 (Nov 1953)
Vol 13, No.1 (Jan 1954)
Vol 13, No.2 (March 1954)
The BIS Subscription Notice 1953

The BIS Ballot Paper 1952
(which includes Patrick Moore proposed by Arthur C Clarke)

Continued
Anual Report of the British Interplanetary Society 1952
List of members of the BIS 1953
List of Books and publications on rocket propulsion and interplanetary flight Aug 1953

Continued
Annual Report of the BIS 1951

I am VERY interested in Vol 12, No.1 (Jan 1953).

Do you still have it?!