Ash dieback findings have passed the 1,000 site mark, just three years after Defra discovered it in a Buckinghamshire nursery.
Chalara was first confirmed in the UK in February 2012 when it was found in a consignment of infected trees sent from a nursery in the Netherlands to a nursery in Buckinghamshire.
In October 2012, Food & Environment Research Agency (FERA) scientists confirmed a small number of cases in Norfolk and Suffolk in ash trees at sites in the wider natural environment, including established woodland, which did not appear to have any association with recently supplied nursery stock.
Latest Defra figures show 1,055 sites including 27 nurseries, 407 recently planted sites and 621 sites in the wider environment such as established woodland have been hit by the disease.
Some 21 per cent of 10km x 10km grid squares squares in England have the disease in them, with 8.7 per cent in Scotland, three per cent in Wales and 14.5 per cent overall.