Cereals Event June 30, 2014 12:00 am Some 24,950 people attended the Cereals Event in Cambridgeshire on the 11th and 12th June according to organisers Haymarket Events. This is slightly down (-3%) on the 25,850 who attended the 2013 show at Boothby Graffoe in Lincolnshire. Cereals will return to Lincolnshire for 2015, on the 10th and 11th June.