If you see an inordinate number of people rootling around London's bins tomorrow, hopefully it's not because the city's economy is shot (not just yet, anyway).
Start up Instagram scheduling company Hopper has created a treasure hunt that will lead one lucky adventurer to discovering £507.16, that's been hidden in a bin somewhere in the capital.
The hunt kicks off midday on 25 July, and anyone who wants to be in with a chance of finding the wonga must register by 11am.
We just hope they've researched what time the bin collection is...