Triangle

I live in East Scotland, it’s a clear day today 30/11/23 and saw on flightradar24 that there was a line of three USAF stratotankers about to pass overhead, so went into my garden with binoculars for a better view, plane one passes by, plane two is just in view about 5 minutes later but on the intended route I see a white dot, which appeared to be static and was, just visible to the naked eye. I looked through the binoculars and this object was triangular in shape, still static but after about 10-12 seconds it disappeared instantaneously like a light being switched off. I looked again with naked eye in case I, or it had suddenly moved and there was nothing. I waited a few minutes after the third plane had gone and that was it. Strange but glad I saw it.