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Map of the north/south dividing line for Tree Health Diagnostic and Advisory Service samples.
Map of the approximate north/south dividing line for Tree Health Diagnostic and Advisory Service enquiries.

If you are unable to report through TreeAlert please use our standard Report Form (below) for written and email requests:

Diagnostic service report form (PDF)

For enquiries north of the Humber/Mersey line:

Tree Health Diagnostic and Advisory Service

Forest Research

Northern Research Station

Roslin

Midlothian

EH25 9SY

Email: thdas.nrs@forestresearch.gov.uk


For enquiries south of the Humber/Mersey line:

Tree Health Diagnostic and Advisory Service

Forest Research

Alice Holt Lodge

Farnham

Surrey

GU10 4LH

Email: thdas.ah@forestresearch.gov.uk

The team

 Alice Holt  Northern Research Station
 Michael Crampton         Steven Hendry
 Anna Platoni Imogen Ryan
 Caroline Gorton Molly Davidson
 Alex Lewis 
 David McKellar 
 Chris Berman 
 Amirah Nigoumi 
 Lucy Turner