Herefordshire is in the centre of the country, which means that it isn't too far from anywhere. So, no matter where the people in your party are travelling from, it shouldn't take too long to get here. For example, Netherwood Estate is about 2.5 hours drive from central London, 1 hour from Birmingham or 3 hours from Manchester.
There are also good train links to Worcester Shrub Hill (from London and Birmingham) or Leominster (from Wales or Manchester).
Birmingham International airport is 1 hour away.