Williams trialled a radical new rear wing and modified front wing on the first day of the first in-season Formula 1 test at Barcelona.
Development driver and GP2 race winner Alex Lynn headed out on track on Tuesday morning for his first two runs with an additional rear wing mounted above and ahead of the original structure. There were also additional new design elements added to the front wing.
Williams says the new parts are being tested to gain more understanding about the car in a bid to find the optimum balance.
The designs would not be legal under the current regulations. However, they are being run to offer insight for both 2016 and more importantly ’17, when radical new bodywork rules kick in.