Red Windsor is a sport (naturally-occurring mutation) discovered in 1985 in Worcestershire, of Alkmene, a 1930s German cross between Cox’s Orange Pippin and Duchess of Oldenburg. It has a Cox-like flavour and acidity, but it is juicier than Cox, with an attractive red skin, and very crisp. It ripens in early-mid September. It is easy to grow, a reliable cropper, and it is self-fertile and so needs no pollination partners. The blossom has a degree of frost resistance, and the tree is unaffected by apple diseases such as scab and canker. It is also known as Sweet Lilibet.

Red Windsor
Red Windsor, photo by Markus Hagenlocher, CC BY-SA 3.0