Strange Plant On Barry's Plot

After getting peanut plants springing up on our allotments courtesy of the little titbits Barry keeps feeding the squirrels a strange plant has now grown on his plot. Does anybody know what it is? The flowers are very short lived opening and closing in less than 24 hours and then falling off to reveal the spikey seed pod as seen in the last photograph.

Plant has now been identified by Kevin Holland who has a plot on the Hemplands site. It is the highly poisonous Datura - Thorn Apple so whatever you do, DO NOT EAT ANY PART OF IT!.