Queen, Mercury records, Trident and John Anthony

I saw part of a YouTube video about the early days of Queen (not a group that normally holds my interest): it tells about a demo recording for Mercury at Trident in June 1969, produced by John Anthony. Does this sound familiar? Could it be that the early VdGG rubbed shoulders with Smile, who were to become Queen? Fortunately for Queen, Mercury passed on the option of signing them, otherwise they too might have been saddled with an unfavourable recording contract.