'Treacle' tart, yet another wonderful British paradox. I've always known it as Treacle, yet its always been made with Tate and Lyles syrup!! The ones we had as children were thinner however, made on a deepish pyrex plate reserved for large jam tarts as well as the treacle ones. We also always did a twisted 'lattice' ie not woven. The large jam tarts were often using up odds and ends of jam and even marmalade so that every section was often a different flavour. Both always came with a large jug of hot custard. Wonderful!!