The guy in the black suit is definitely NOT using Mini Sub 8s. The clamp makes the extension flush with the base bar (I have a pair). They allow the lowest arm rest height I have ever seen (on a clip-on) with no modifications.
Speedliners are something I saw in my last trip to England in Yeovil. They are at the website
www.triuk.com . They are an ingenious and cleverly simple shorty aerobar. They are lighting up the draft-legal tri scene from what I can tell.
The first pic looks like the Speedliners. What the guy in the black suit is using is anyone's guess. The frontal area of the clamp looks suspiciously like Profile.