Martin Hawkswell (inset) tips a load of sugar beet at York factory last weekend as part of a trial by British Sugar into the feasability of Sunday opening. Mr Hawkswell, who this season has lifted 520t off 10ha (25 acres) at Barton Moor Farm, Foston, says Sunday opening is a good idea if it leads to increased efficiency at the factory and a shorter campaign. But BS agricultural manager Philip Cock says the main driving force for Sunday opening is to ease traffic flows around York. As part of the trial, BS is paying a one-off incentive of 35p plus 2p/mile for each clean tonne delivered, equivalent to about £18 a load. There were 67 deliveries last Sunday, including Mr Hawkswells which produced 15.5% sugar, 5% dirt tare and 7.8% crown tare.