The answer to that is in the guidance notes somewhere. you are not expected to do anything other than fly straight out of the zone, weather avoidance must be communicated to the atc unit. However you might be able to tell them you need to orbit ? I guess it'll depend on how busy they are. If you deviate from the f.plan you must tell them first.
The flying mags pilot/flyer have articles on it, all recently. Check out the latest flyer mag. ( other mags available
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