I just thought I would point out that having used the number successfully on many occasions including today that the the 01306 number (01306 651504) listed as the Delivery Office for the Royal Mail in Dorking can definitely safely be added to the Verified numbers list.  Like many delivery offices it is only answered during times when staff are around but when they do answer they are always incredibly helpful in answering questions about items that have been returned to their office or underpaid items.  This is unlike the useless central Royal Mail customer services operation on the 0845 number.