We've done the hard bit and found sites where there may be clusters of ancient trees in your region - so we want you to go and hunt for trees! In each area below we have given a brief location and for those of you that are technologically minded an Ordnance Survey grid reference. By clicking on the icon it will take you to the relevant site on our interactive map. Happy hunting!
North Yorkshire:
Ripley Castle, park and grounds, north of Harrogate, SE28276053.
Duncombe Park near Helmsley, SE60358317.
South Yorkshire:
Rossington, SK62839877.
New Rossington, SK60489845 near Doncaster.
Wadworth, SK54649872.
Sandall Beet Wood, SE60960374.
Also between Fox House and Hathersage on the Hathersage Road out of Sheffield, SK24088077.
West Yorkshire:
Bolton Abbey, Abbingdon. Admission charge. SE07115385.