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Cllr Gareth Elliott said:
"The incorrect designation by Royal Mail has several knock-on effects that people living in these areas experience every day. Services other residents take for granted can often be confused across boundaries.
"I have been contacted by one resident who was told her child could not attend a Richmond Borough School because she was wrongly considered a Hounslow Resident due to her postcode. For those that live in Whitton and pay Council Tax to Richmond Council it should not be too difficult for Royal Mail to bring them into line with their fellow residents."