Since being purchased by Tata, the company has seen a dramatic transformation in its business since 2009 when total annual production stood at 158,000 units.
During that time annual output has risen by almost 70% thanks to more than £11bn of R&D investment to create an expanded and enhanced range from the two iconic British marques.
In 2015 alone, JLR brought 11 new and refreshed cars to market, including the Jaguar XE and XF and the Land Rover Discovery Sport.
Jaguar Land Rover's executive director of manufacturing, Wolfgang Stadler, said: "Britain is the beating heart of our business, so becoming the country's largest vehicle manufacturer is a remarkable achievement, demonstrating our steadfast commitment to the UK manufacturing sector.
"2015 was a challenging year for the industry against a backdrop of socio economic instability, but it is a testament to our strong product range and dedicated team of employees that Jaguar Land Rover has delivered year on year growth, with more exciting products come."
Over 80% of JLR's UK based production is exported to over 160 markets and this year the company will see further new products including the Jaguar F-PACE and Range Rover Evoque Convertible hit its global network of retailers.
It is the increasing global demand for its products that has seen Jaguar Land Rover announce plans to expand its international manufacturing footprint to support sustainable global growth.
But with plans to invest a further £3bn in its products and facilities in the 201516 fiscal year, such as, the expansion of its Whitley and Gaydon R&D centres, the UK remains at the very heart of Jaguar Land Rover's business.