Culdee: "He was different, ya know, before he was named Patrick. He wasn't the silent, embarrassed type. He was named Lord Harry, and he was a snooty cunt. Pardon my language, but it's true."
The final book (Thomas and His Friends, 2011) was the official final installment in the series. The words "The End" were even written on the last page, and Christopher Awdry even said he was done at a premiere for TOTB (I think). Plus, if MSSFM were to illustrate, his illustrations would've looked too great (unless he were to recreate existing ones for new editions or something).