Actually, can you put me at RH1 6QG by St John's Church. ThanksI've moved you to Cromwell Road, Redhill now Chris.
We use the first half of the postcode to maintain privacy but some postcode areas are so large the centre indicated on the map can be miles away from someone. The postcode system was based on the old sales cell system and based on population, so more sparcely occupied ares get large postcode areas.
Someone once gave me a central Wales postcode and the point indicated turned out to be over 50 miles from his location! Clearly a very lightly populated area so the postcode first half covered a vast tract of land.