BMW is to invest £250m in its UK Mini factories, including those in Swindon and Oxford, over the next three years.
The announcement was made during a visit by Business Secretary Vince Cable to the Oxford plant, on the day when the Olympic Torch Relay will also pass.
The announcement comes on top of a £500m investment promise in June last year.
BMW said the investment showed its commitment to Britain "as a vital manufacturing base".
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Tuesday evening's weather for the east of the region
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Highways England thanked people for pointing it out. The A34 sign has now been removed.