Half a million oysters to be introduced to Humber estuary in restoration plan

European flat oyster is defined as collapsed' in UK but there are hopes it could return to coastal waters

A box marked special delivery" arrived about midday at Spurn Discovery Centre, on a remote East Yorkshire peninsula in the Humber estuary.

It is unlikely the postal worker had any idea it contained 300,000 living oyster larvae - tiny pinprick-sized organisms destined to become part of a new oyster reef just off the English coast.