The walking distances table provides no background. IN Whyte Young and Green's "How far do People walk? PTRC meeting in London July 2015 they set out in a Table Mean and 85%ile distances UK excluding London 85%ile 800m. Is there an evidence base behind this? The Inspector will ask for one. The IHT Guidelines 200 Para 3.3 provided an evidence base.
However with more and more developers providing cul de sacs, approved by LPA's in Kent and Medway the distances will prohibit development. Less housing or the Policy will be rejected. The distances shown are in fact walk between bus stops! Who ever put the table together should review the details.