Welcome James,
i live just outside Saffron, but mainly travel to ride on a weekend (Epping or Danbury) There is plenty of bridleway and footpaths around the town that you can ride, and we are still building the XC loop up at Carver barracks airfield, although i wouldn't advise riding there any time soon as it is a mud fest after the duathlon at the weekend
however it should be fit for purpose and ready for MSG as soon as the weather gets better (if it gets better) and i think we will be putting in some all weather surfaces in the worst areas.