Sales of Jaguar brand of vehicles in February were at 11,565 units, a fall of 5.2 per cent, the company said in a statement.
Land Rover range posted sales of 28,346 units in the month, down 1.5 per cent, it added.
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The company said retail sales of 39,911 Jaguars and Land Rovers in February were 2.6 per cent down on "the previous years all-time high".
"Solid demand in China (up 3.3 per cent) and other overseas markets (up 1.5 per cent ) was offset by lower sales in the UK (down 15.2 per cent for the month) and Europe (down 6.9 per cent) , where trading conditions remained challenging.
Jaguar Land Rover Group Sales Operations Director Andy Goss said the company is "continuing to see weaker market conditions in Europe and the UK in particular largely reflecting diesel uncertainty".