Remind anyone else of Black Mirror?

Yes! It thought that too. It's got a similar dark, creepy feel to it.

I thought the same! Probably because it's an anthology series, is British, and has very dark humour.
But I think the difference between Dark Mirror and shows like this one (and Psychoville, etc) is that Dark Mirror was very much a social commentary, whereas Inside No. 9 is more about human relationships on a personal level. I think. I mean, we're only three episodes in so it's difficult to already try to summarise the series :P
There are a lot of similarities though. I really like both series.

There is always Daniel Kaluuya, who was on Black Mirror and Psychoville. Funny link beetween this 2 worlds. Or not.

Last Gasp in particular

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Yup.

Also Tales from the Crypt.