Hi george,
You could well be right but I believe it was mentioned in the program as a sort of suprise ingredient to a curry we would not normally think went in it. Whether it was a genuine ingredient or a wind-up I don't know. I think it would make the dish taste "soupy" as Heinz Tom soup has a strongish taste.
As it was broadcast on Sky I have no doubt it will be repeated. It was on the UK Food Channel the last time if my memory serves me right.
Ray