Two new cases of ash dieback disease have been discovered in the North East.
They are in established woods or forests in the Wooler area of Northumberland and near Guisborough.
The four cases announced earlier this week between Newcastle and Richmond were detected in saplings rather than in mature trees.
The Government says the latest discoveries do not mean the disease is spreading rapidly - it could have been present in these areas for several years.
More top news
The operation targets foreign national offenders and also UK criminals who target and take advantage of vulnerable people coming to the UK.
A north-east contingent start their three-day journey from York Minster to the National Memorial Arboretum in Staffordshire on July 28th.
The troops will serve as engineers in the country, which has been ravaged by conflict, famine and disease in recent years.