Campaigners have launched an appeal to try to save for the nation the mother tree of perhaps the most popular cooking apple in the world. The original bramley apple tree , which grows in the garden of a cottage in Southwell, Nottinghamshire, is for sale, with the cottage put on the market by its owners, Nottingham Trent University. Every single bramley apple ever eaten can be traced back to the tree, which was planted from a pip by a young girl, Mary Ann Brailsford, in the early 19th century. It has been recognised as one of the 50 most important historic trees in Britain but has no legal protection. Rather than have the 220-year-old tree fall into private hands with no public access, campaigners are seeking to raise money to buy the property and turn it into a heritage centre.…