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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 Christopher Hirst
Caroline Gorton Molly Davidson
Alex Lewis Tana Holmes
David McKellar 
Christopher Berman 
Amirah Nigoumi 
Lucy Turner 
Sholto Holdsworth
Megan Richardson