The following has been copied from the East Coker Preservation Trust Blog (which also has a rather nice poster as shown above) and makes a very important case for challenging the Planning Inspector's decision:
Flawed Plans For Newmarket Sunk By High Court
The ruling shows that Planning Inspectorate decisions are not always correct. It also shows they can certainly be challenged.
Further, it shows that local authorities that do not ensure legally correct process is followed will open themselves to legal challenge and payment of challengers' costs. Challengers in similar circumstances should find it relatively easy to obtain insurance for costs when taking action.