NB: SWR Desiro refurbishment is currently being done at a slower rate due to class 442 delay
Partially refurbished 450s:
003, 006, 007, 011, 014, 026, 027, 028, 030, 031, 035, 036, 040, 074, 076, 086, 087, 093, 099, 109, 110, 124, 126(23 units)
Full refurbishment of trains:
444s:
003, 005, 006, 007, 008, 010, 013, 015, 019, 020, 025, 029, 033, 034, 035*, 038, 039, 040, 042, 044 & 045.(20 units completed)(44% complete)
450s:
001, 005, 008, 010, 012, 013, 015, 016, 018, 019, 020, 024, 025, 032, 033, 037, 038, 041, 543*, 073, 075, 079, 080, 081, 082, 083, 084, 085, 091, 094, 095, 097, 100, 102, 103, 105, 106, 111, 112, 113, 115, 117, 119, 121, 122 and 125(45 units completed)(35% complete)
*currently being done
Let me know if any more trains have been refurbished and I will edit this post regularly