[silverbaggie]

I can only think of two Albion players who became legends in Europe.
Laurie Cunningham was one and the other:-

possibly Derek Kevan but his goal to games ratio was 173 goals in 291 appearances (more than 1 in 3)

I cannot think of a player who scored a hat trick on his England debut. Presumably this was not at full international level.
Or was the hat-trick during his debut for the Baggies?

There was a Billy Lee who scored 25 goals in 76 matches for the Albion but, apart from that?