Funny, Mo, I have two of the three apple varieties that you mentioned. I don't have your Laxton's but I do have Laxton's Fortune, which crops in September but is hopeless for keeping! My Lord Lambourne, for some reason, gets bitter pit every year. James Grieve is a real trooper of a tree, producing far more every year than we can use. The skin can be a bit thick, but it's my go-to grab-an-apple when I'm gardening. It's good from about early September. My earliest apple is Discovery, which I can start to munch by early August if I can get there before the birds and wasps. I also have a Fiesta, a lovely, crunchy apple, and Jupiter. All the ones I've mentioned taste great, and far outstrip anything you can buy in shops.