Edward VII is a fairly typical English cooking apple, although it was developed in the early 20th century, making it more recent than most traditional English cookers.
Edward VII has remained popular because it is an excellent apple tree for the garden. It is notably hardy and problem free, and has natural resistance to most of the mainstream apple diseases and problems. It flowers quite late in the spring, which can make pollination a challenge, but on the other hand this means it is rarely caught out by late spring frosts. As a bonus, the blossom is attractive too.
The parentage is not known for sure but is probably Golden Noble and Blenheim Orange. Visually Edward VII resembles Golden Noble most closely.