I did the Thwaites as my first ever batch. It turned out OK, given everything that I did wrong (chloromine in water and little temp control). I also got some nice results out of the Gales Festival Mild. Honestly, I was stabbing in the dark when picking the recipes, so I can't say for sure what the best recipes are.
I also own the classic styles book on Mild, which inspired me to look at the grist formulations of all of the recipes in BYOBRA. If I were to go back and brew several of the recipes from the book, I might pick based on the different grist formulations. There are some that are nothing but pale and crystal, some that are pale, crystal, and one dark malt, some that are pale, crystal, and two dark malts, and some that contain pale and dark malts but no crystal (that's off the top of my head- it may be somewhat different from what I remember). If you, like me, have no particular commercial brand of mild that you know and love, categorizing the recipes by malts used and brewing one from each family might be a good place to start.