1965

Charge                    Weight

    4d                     2 ounce (maximum charge for letters to any destination)

    2d                   for each succeeding 2 ounce (or part of) (upto a maximum of 1 lb)
    3d                   for each succeeding 2 ounce (or part of) (over the 1 lb limit)

Unpaid letters were charged double rates.