Tuesday 25 August 2015 14:19, UK
Watch as Ted Kravitz guides you through all the technical developments that caught his eye during Practice One in Belgium.
Mercedes have a dramatically different new rear wing on show with a 'scoop' design which Ted feels will use the air around the rear of the car more effectively to give "much more downforce."
Clearly busy over the summer, the Silver Arrows also tested a rear-wing likely to be used at Monza and a new front wing.
There was also a new front wing at Ferrari, with the Scuderia ditching the cascades to reduce drag.
