One of the UK’s top aerobatic pilots, Lauren Richardson, shows off her skills in her Pitts Special aircraft during (this second part of her display at) the Little Gransden Air and Car Show in 2014.
The Pitts Special (company designations S1 and S2) is a series of light aerobatic biplanes designed by Curtis Pitts. It has accumulated many competition wins since its first flight in 1944. The Pitts biplanes dominated world aerobatic competition in the 1960s and 1970s and, even today, remain a potent competition aircraft in the lower categories.
Sources: YouTube; Wikipedia