I shouldn't worry too much about the missing post codes.
According to a letter in the TIMES on Saturday from an American gentleman in London he
recieved a letter just addressed to 'Paul Proctor, Bloomsbury,London,UK' - no
house number, no street, no postcode - and it got there in 5 days from US.
researching HALL,PILKINGTON,HAWORTH,STEWART,McKECHNEY & BERRY