The death date of 1465 is indeed listed by Duncomb but there appear to be other problems with this line:
There is a reference on this profile that Thomas' wife should be Alice Hackluyt. Thomas' son Richard [Walywn-89] currently has this woman set as his wife.
According to Burke, neither Thomas [Walywn-90] nor his son Richard should be married to Alice but instead, Richard's son Thomas (no Wikitree profile at this time) is the true husband of Alice.
Thomas 90 appears to be married to the correct woman, Unknown Baskerville who, according to Burke, is Isabella, "said to be of" the ancient Baskerville line.
According to Burke, Richard 89 is married to Clementia Write. The WT line shows Clementia as the mother of Thomas 90.
I've sent an email to the PM to coordinate making some more changes to this line.