Freebird
Master Sergeant
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Also some bad luck, one of the early hits on the PoW knocked out the radio.
However, Philips should have called for cover once the Japanese aircraft spotted Force Z and began to shadow
Your #1 isn't accurate. The RAF leadership in Singapore informed Admiral Phillips that sustained fighter protection over northern Malaya was impossible because the northern airfields had been, or were being, evacuated. However, a squadron of Buffalos was placed on dedicated alert to respond if called for by Force Z. Unfortunately, it seems that Admiral Phillips just heard "no RAF fighter cover" and so he didn't even call for fighter support when the first Japanese aircraft was sighted as Force Z retired back to Singapore. By the time the call was made, it was too late and the fate of Repulse and PoW was sealed despite the engagement taking place well within the range of the fighters sitting at Singapore.
The RAF did not fail to provide air cover. The RN failed to ask for the cover that was available.
Also some bad luck, one of the early hits on the PoW knocked out the radio.
However, Philips should have called for cover once the Japanese aircraft spotted Force Z and began to shadow