Last week I wrote about a mystery pro-vaping demo in Whitehall.
I'd seen the protest promoted in advance on Twitter. What I didn't understand was why there was no evidence (photos, tweets etc) of it actually happening.
One tweet, posted ahead of the demo, mentioned that ITV News would be filming.
I have now been told that consumer editor Chris Choi did indeed turn up to record the protest and interview participants ... but no-one was there.
No matter, thanks to the Observer it's on record that a demo took place outside the Department of Health.
So, case closed. Mystery solved.
PS. Over 100 people attended the launch of Forest EU in Brussels last night. Report to follow.