Cat 1 - WW2 Aircraft
Red 7 Departing RIAT 2010
Winter Challenge Cat 1 by np1991, on Flickr
Cat 2 - Ground crew/Air crew as focus
Fire Crews attending an IFE at Lossie
Winter Challenge Cat 2 by np1991, on Flickr
Cat 3 - Reheat
Lossie again
Kick of Flame by np1991, on Flickr
Cat 4 - Snow
Winter Challenge Cat 4 by np1991, on Flickr
Cat 5 - Colour Popping
Leuchars 2011
Winter Challenge Cat 5 by np1991, on Flickr