For the 2007 Centenary TT Races, a number of special events where held to commemorate 100 years of the Isle of Man TT Races. This include a Centenary TT race re-enactment, a display by the Battle of Britain Memorial Flight over Douglas Bay and a music festival with the headline act of the UK group The Who. The 2007 Isle of Man TT race festival was the first event that a one-way traffic flow was introduced on the mountain section of A18 Snaefell Mountain Road between Ramsey Hairpin and the Creg-ny-Baa road junction.