Bio: In The Baker Street Four (2017) - SC vol. 01 page30 introduced (to Sally) as "Tom of Kilburn",
and later in the same book on page 64 Charlie calls Tom "Tom o' Kilburn" in a semi-private conversation so presumably Tom is from Kilburn.
Described (and self-described) as being irish (at various points in The Baker Street Four (2017) - SC vol. 01)