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Scientists are now conducting further research aimed at identifying multiple resistance genes in genetically modified potatoes that will thwart future blight attacks.
Non-modified plants grown in a series of series of field trials were all infected after being denied protection from chemicals. However, no-one can say at this stage how long the GM strain will hold out against blight, which is notorious for its ability to overcome resistance.
The Irish potato famine of 1845 was a disaster for the poorer people of Ireland who depended on potatoes for food and income.
A new strain of British genetically modified potato appears immune to the devastating fungus responsible for the great Irish famine of 1845, research has shown. Late blight, caused by the organism Phytophthora infestans, remains the potato farmer's greatest enemy to this day.
Each year UK farmers spend around £60 million keeping the infection at bay with pesticides. In a bad year, losses and control measures combined can account for half the total cost of growing potatoes.
In the latest of a series of field trials, conducted in 2012, the fungus was unable to break down the defences of any of the GM potatoes.