Dai Thomas, policeman from Captain Britain stories,
sees his wife Valerie killed in a battle between the
Hulk, Thor, and possibly a super-villain while in New
York. Mentioned in Guardian article in Daredevils
(Marvel UK)#9 (which shows an article mentioning a battle between the Hulk and "a super-villain), brief flashback in Captain Britain
II#1 showing the Hulk and Thor, wife's name from Knights of Pendragon I#1-6.
When did this happen? Was she still alive when Thomas appeared in Marvel Preview#3 and the earlier Captain Britain series?
Dai’s wife’s death was initially just a throwaway rational to explain why Dai hated superheroes so vehemently. I don't know how the details may have been refined by later writers.
Okay. For those wondering, the death of Dai Thomas' spouse was said to take place in New York during a battle between the Hulk and "a super-villain" in that Guardian article, while Captain Britain II#1 features a one-panel fb which seems to show the Hulk and Thor in silhouette.
Actually, since the death of Dai Thomas' spouse was referenced as early as Captain Britain I#8, the recorded Hulk and Thor encounters that best match that took place in New York are FF I#25-26 and Avengers I#2.