2006 Test mail Birmingham coded for Sequence Sorting machine tests at Stratford (the E15 'Eastern District' Delivery Office) - this demonstrates the 'Delivery Point (DP)' extension to the postcode held only on the Postal Address File (PAF) to identify each address uniquely. Unclear from the label and manuscript note whether 2E was the intended DP for the Walk No 221 'Drapers' and it's in fact been coded to 2D or the label has been produced incorrectly. Interesting item of test mail as inwards sorting based on a Delivery Office Sequence Sort was being tested following trials between Birmingham and West Bromwich- see scan