A gasoline tank truck plowed into the rear of slow-moving traffic, killing 12 people and injuring four south of Preston in northern England. Police said the tank truck, three other trucks, a minibus and two cars were involved. Firefighters used metal-cutting equipment to recover 12 bodies from the tangled wreckage. The tank truck driver and a family of three were hospitalized with unspecified injuries. Lancashire police said the crash occurred on an expressway near where a 30-m.p.h. speed restriction had been imposed because of road repairs. The usual speed limit was 70 m.p.h.