A4 4-6-2 4464 Bittern speeds along the Great Western Mainline at Denchworth on 18 October 2014 with the Vintage Trains 1Z44 07:27 Tyseley to Bristol Temple Meads 'Western Streak' railtour. Brunel's 'Billiard Table' route is obviously posing no problem for the loco, as there was very little exhaust and equally little sound!