The Egremont Russet is a

cultivar A cultivar is a type of cultivated plant that people have selected for desired traits and when propagated retain those traits. Methods used to propagate cultivars include: division, root and stem cuttings, offsets, grafting, tissue culture ...

of dessert

apple An apple is an edible fruit produced by an apple tree (''Malus domestica''). Apple trees are cultivated worldwide and are the most widely grown species in the genus ''Malus''. The tree originated in Central Asia, where its wild ancestor, ' ...

, of the russet type. It has a rich, nutty flavour and crisp, firm and fairly juicy flesh. It was first recorded in 1872, and is believed to have been raised by the

Earl of Egremont Earl of Egremont was a title in the Peerage of Great Britain. It was created in 1749, along with the subsidiary title Baron of Cockermouth, in Cumberland, for Algernon Seymour, 7th Duke of Somerset, with remainder to his nephews Sir Charles Wy ...

at Petworth in Sussex, UK. It was first popular in the

Victorian era In the history of the United Kingdom and the British Empire, the Victorian era was the period of Queen Victoria's reign, from 20 June 1837 until her death on 22 January 1901. The era followed the Georgian period and preceded the Edwardia ...

and has remained popular ever since. It is the third most common apple in commercial cultivation in England & Wales after Cox's Orange Pippin and Bramley, although its 308ha represents just 3.7% of total apple orchards.orchfruit07_2.xls
It is a popular garden apple in the United Kingdom (UK) and trees are widely available from UK garden centres.

References

National Fruit Collection page
NFC reference 1979-159
reference for Lord Egremont (pdf)
{{Apples, state=collapsed British apples