Royal Mail refuses to deliver because of seagulls

Anyone living on Liskey Hill Crescent in Perranporth, Cornwall, will have to collect their letters from the nearest Post Office, because Royal Mail employees have refused to deliver post to the street any more. Its excuse is the seagulls - which dive-bomb any passing pedestrians.

But how much trouble can a seagull really be, and can Royal Mail get away with this?
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