The Midlands-based company racked up half-year losses of £354 between March and September

The Indian owner of Jaguar Land Rover has told Theresa May it remains committed to Britain’s biggest car maker, amid concern over Brexit and speculation about takeover interest.

The chairman of Tata Sons, Natarajan Chandrasekaran, is understood to have written to the prime minister to insist that Tata plans to keep investing in Jaguar and has no intention of selling.

Tata bought the car maker from Ford in 2008 for $2.3bn (£1.15bn at the time), transforming it from a financial basket case into a giant employing 40,000 staff. However, falling diesel sales, waning consumer confidence, a collapse in the Chinese market and Brexit contingency planning have wreaked havoc in recent months.

The Midlands-based company racked up half-year losses of £354 between March and September, reversing