Prewett's biscuits Jammy Wheels 160g. Free from gluten & wheat! Delicious gluten free shortcake biscuits with a raspberry flavoured fruit filling, for the whole family to enjoy. Since 1872, when William Prewett began milling flour in Horsham, Sussex, the Prewett's name has been synonymous with fantastic quality foods. Our biscuits are simply delicious &, amazingly, they're Gluten Free!