Any info on wet weather wheel arch testing?

Has there been any details released about the wet weather wheel arches they tested at Silverstone last weekend?

I haven't seen or heard any discussion since the test. The concept sounds pretty interesting.

https://www.skysports.com/f1/news/12433/12920028/formula-1-mercedes-mclaren-participating-in-wet-weather-wheel-arch-trial-at-silverstone