Apparently the 18 year old (who actually placed the bomb) is considered such a tiny tot that they’re not even posting his picture except from behind as he was caught by security cameras in the Tube. He’s an Iraqi and appears to be small and thin with longish brown hair. You can see him in photos with the 21 year old but his face has been pixilated.
That said, I feel bad for the naive but very PC elderly couple that was hosting these vipers in its bosom.
I wouldn’t bet that they’re really naïve. It looks like they turned this refugee business into a career.