There is something funny going on here, but I can't put my finger on it. Let's look at the evidence.
The chap on the left is holding a parasol aloft in his left hand, while balancing a cup of tea on the other. The mother with the child seems quite normal but look at the face of woman behind and to her left - the expression is very disconcerting. As for the chap in the suit, why is he holding his hat and is there something concealing beneath it. One might also ask why the ends of his tie have been cut off. Next is the woman in the dark trilby - why is she dwarfed by the camping table? Alongside her, the next woman seems distracted - perhaps she is receiving a message in an ear piece? Did they actually have ear pierces at the time this photograph was taken. Finally, who is taking the photograph and whose is the camera in the foreground. Questions, questions . . . Any ideas?