The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Time Out's[3] own announcement of 6 August 2026 says the market will open "in the summer of 2028" at 10 Piccadilly. A season is a period, so the pin takes its last day; northern-hemisphere summer closes at the end of August, giving 31 August 2028. It will move when a day is published - this is two years out and the building is still in development.
For the origin the London announcement turns on: the first Time Out[1][3] Market opened in Lisbon's Mercado da Ribeira in May 2014, "the first of several planned food hall ventures for Time Out magazine" - the concept was exported for fourteen years before reaching the magazine's own city.
Time Out's[1] announcement two months earlier, which lists the thirteen trading markets and the five in development, and so sets out the portfolio this London site is to be the flagship of.
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