"On the other hand Professor Mick Aston found the theory that the story was influenced by Thera to be plausible..."

That's exactly what I said. Plato may well have drawn on stories about 'lost' Thera, and that city in Anatolia and the rest when making up his Atlantis - much as JRR Tolkien drew on his knowledge of Northern European myth when he created Middle Earth - but that doesn't make them 'the Real Atlantis'. There is no such animal.