11. Portugal would almost certainly become involved in any Axis move in Spain. The enemy being certain to seize bases on the Atlantic coast of Portugal and if possible also in the Azores (unless forestalled) to further the U-boat blockade. CONCLUSIONS. 12. We anticipate the following moves on the part of the Axis Powers:(a) Continued preparations for a sea-borne invasion of Great Britain as an ever present threat to immobilise our forces. This threat is likely to remain at any rate so long as Germany retains numerical air superiority, for implementation if and when conditions become suitable.