Full refurbishment of trains:
444003, 444007*, 444010, 444015, 444019, 444020, 444025, 444029, 444033, 444034*, 444038, 444040, 444042 & 444044.(12 units completed)(27% complete)
*Currently being done
450005, 450008, 450015, 450016, 450018, 450019, 450020, 450032, 450033, 450037, 450041, 450075, 450079, 450081, 450082, 450083, 450084, 450085, 450091, 450094, 450097, 450100, 450103, 450113, 450115, 450119, 450121, 450122(28 units completed)(22% complete)
Let me know if any more trains have been fully refurbished and I will edit this post regularly