Kim Kardashian was NOT in London yesterday -- but her Irish doppelganger was ... and the girl's so hot, she gives the real Kim a run for her money.

Her name's Georgia Salpa ... Ireland's premiere glamor model -- and in case you're wondering about her non-Irish complexion ... her dad's Greek.

The 26-year-old isn't a Kim K lookalike by trade -- posing yesterday outside the UK's National Television Awards -- but based on these pics, she should be.

So we gotta ask ...