I don't think that is normal UK usage. It sounds odd to me without "or" before the "else" in those sentences. From other comments here, that seems to be true for others too.
"Someone else" sounds correct but else isn't trying to act as a conjunction there.
That's how my UK friends speak. Maybe it's a regional thing?
More common in the North and Scotland, I think.
Scots (the Scots language, not Scottish English) tends to use bare "else" wherever "otherwise" is used in English, so I assume it's coming from the Northumbrian dialect of Middle English and leaks through to those dialects of Modern English with more Northumbrian influence.