SANDWICH SUCCESS Britain’s sandwich business is expanding fast. Half the population buy sandwiches at least twice (29) week, and they are spending more (30) them (31) sandwiches are made at home, while (32) from shops are selling in growing numbers. One reason is that packaging keeps sandwiches fresh for up to 48 hours, making (33) possible to mass-produce them centrally and distribute them widely. (34) reason is that petrol stations, wanting to expand the range of (35) they sell, have quickly become major outlets for sandwiches. The increase in sandwich sales has also been helped by changing social trends. Many people have stopped (36) family meals at home, and (37) choose the time and place to eat. Time has become more important than price, (38) convenience is the most important reason (39) all. Taken together, these changes are making the sandwich industry (40) into a very valuable business.