I have recently ordered copies of these folders from The National Archives:
* AIR 2/7758 GENERAL AND WARLIKE STORES (Code B, 41): J.W. bombs for attack of ships in harbour: operational requirements
* AIR 14/992 J.W. bomb for attacking ships
* AVIA 19/693 500lb bomb type J.W: trials
* AIR 2/7758 GENERAL AND WARLIKE STORES (Code B, 41): J.W. bombs for attack of ships in harbour: operational requirements
* AIR 14/992 J.W. bomb for attacking ships
* AVIA 19/693 500lb bomb type J.W: trials
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