 On 25 September , the French returned with a larger force of eighty @-@ three bombers to cause additional damage to the naval base and harbour installations . Again , aircraft of the British Royal Air Force made no appearance . However , the French crews did report encountering heavy anti @-@ aircraft fire . One <unk> 451 bomber was lost and 13 other aircraft were lightly damaged during the two days of bombing attacks . The British armed trawler <unk> Stella Sirius was sunk by bombs . 
