It also gave the investors a one-third stake in Convex, which owns 100% of LidRock.

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In profile, the powerful convex curve of the bonnet flows seamlessly through a steeply raked windscreen into a roofline which deliberately peaks towards the rear of the cabin to emphasise the traction available from the vehicle's rear-wheel drive powertrain.

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At Wooller in Northumberland, however, the hilltop is level, with a convex sloping shoulder.

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But then a colleague at his Atlanta investment company, Convex Group, passed him a plastic lid with a coupon attached to it in August 2002.

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