Walsh has been very quiet since puffer-gate and the subsequent revelations about Froome's TUE at the TdR - but today, in an article for the Sunday Times, he broke his silence.
I've only seen quotes from the article on the CN website, but the following is quite telling:
"What has happened to the team’s belief that TUEs should not be sought for riders in competition? Farrell says he was unaware this ethical position existed within the team. Froome says he never heard of it. But Peters has said it did exist at one point and the team are in only their fifth year," Walsh writes. "As in the case of the appointment of (former Rabobank doctor) Leinders, Team Sky talk the talk of high ethical standards but do not walk the walk."
Finally, from Walsh's own mouth - Sky talk the talk, but do not walk the walk!
I'm sure Walsh hasn't delved too far below the surface in this article, but it's a start!