ANNEX 'A' SCALE OF ATTACK BY AIRCRAFT AGAINST THE U.K. AND IN THE MEDITERRANEAN UNITED KINGDOM. 1. The different assumptions given do not materially affect the potential scale of attack by piloted aircraft. AVAILABILITY OF FORCES 2. The bomber force (excluding the specialised anti-shipping units) which could be employed for attacks against the United Kingdom, at this time, is unlikely to exceed 200 long range bombers and 35 fighter-bombers. It is unlikely that this force will be appreciably reinforced during the period under review; any reinforcements which may arrive will accrue rather as replacements than as reinforcements proper.