The two factors that greatly accelerated the Industrial Revolution in Britain were technological innovations and access to natural resources. Technological advancements like the steam engine and spinning jenny revolutionized production processes, increasing efficiency and output. Additionally, Britain's abundant resources, particularly coal and iron, provided the necessary materials for industries to thrive. The nation's extensive colonial empire facilitated access to raw materials and new markets for finished goods, thereby fueling economic growth. Together, these elements created an environment ripe for industrialization, transforming Britain into the world's leading industrial power in the 18th and 19th centuries.