There are more than a handful of stories about the origin of this popular dish.
In 2001, British Foreign Secretary Robin Cook declared that "Chicken Tikka Massala is now a true British national dish, not only because it is the most popular, but because it is a perfect illustration of the way Britain absorbs and adapts external influences." He went on to explain that "Chicken Tikka is an Indian dish. The Masala sauce was added to satisfy the desire of British people to have their meat served in gravy.(wikipedia)