The investigation into The London Weekly was mentioned on this week's Guardian Media Talk podcast (around the 18:30 mark).
For more detail on the investigation see this post by James Ball, as well as two earlier posts he wrote: an open letter to The London Weekly and this one.
Judith Townend at Journalism.co.uk published this overview of some of the findings.
I also blogged a roundup on the Online Journalism Blog.
You can join the investigation here.