It it common to use “Is it?” as a general rhetorical confirmation question?

For example

A: I'm going to Leeds tomorrow.

B: Is it? (instead of "Are you?" / "Really?" / etc)

or

A: I got her a present.

B: Is it?! (instead of "Did you?!")

I ask because I was in South Africa last year and heard this rhetorical feature first time there. I'd got the impression it was unique to South African English, but I just heard it used many times in the Mike Leigh film 'Hard Truths', set in London, which led me to wonder if this is a common thing in the UK.

I wonder if perhaps it's a London thing or a linguistic feature of the Black British community of London, given that the characters in the film are of that community. (I lived for a few years in Birmingham and Liverpool and never heard it there.)

Thanks!