Greywell Mill on the upper reaches of the River Whitewater. The old waterwheel is still to be seen at the right-hand end of the building. (photo by Andrew Smith, 2006)

Greywell is a small village in Hampshire, England. It is the birthplace of Bill Newton Dunn, an MEP for the Liberal Democrats.

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Coordinates: 51°15′N, 0°58′W Greywell village has several times won the best kept village competition. It has the Basingstoke Canal running underneath part of it in a long tunnel. The tunnel is home to some rare bats. The canal goes on towards North Warnborough crossing the river Whitewater and passing the ruins of King John's castle.

For more information on King John's castle see the web site of the Basingstoke Canal. Greywell is on the other side of the M3 from Hook.It is about 2 miles from Odiham There are hundreds of great walks around the area.