UPDATE 1-BP promotes veteran upstream boss as No.2 to CEO Dudley
* Lamar McKay, 57, has worked alongside Dudley since Amoco * BP source says move is not about succession * BP says McKay to help run company amid oil price storm (Adds details, background) By Ron Bousso and Dmitry Zhdannikov LONDON, Feb 1 (Reuters) - BP has promoted Lama
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