Imagine (as we often do) that you were one of the 150 buyers lucky enough to have a £2.5m Aston Martin Valkyrie on order. Fortunately, Aston invited us to their purpose-built customisation chamber, to experience the steps every customer will go through! Subscribe to Top Gear for more: http://bit.ly/SubscribeToTopGear

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Series 25: http://bit.ly/TG-S25

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