March 31, 2009 Post and Go Stamps: 2009 September 17, 2010 Post & Go – Birds of Britain (1st Series) January 24, 2011 Post & Go – Birds of Britain II May 19, 2011 Post & Go – Birds of Britain III September 16, 2011 Post & Go – Birds of Britain IV February 24, 2012 Post & Go – British Farm Animals I – Sheep April 24, 2012 Post & Go: Pigs – British Farm Animals II May 21, 2012 Post & Go Union Flag September 28, 2012 Post & Go – British Farm Animals III – Cattle February 20, 2013 Post & Go – 2nd Class & 2nd Class Large February 22, 2013 Post & Go: Ponds – Freshwater Life 1 June 25, 2013 Post & Go: Lakes – Freshwater Life 2 September 20, 2013 Post & Go: River Life – Freshwater Life 3 February 19, 2014 Post & Go: Spring Blooms – British Flora 1 September 17, 2014 Post & Go: Symbolic Flowers – British Flora 2 November 13, 2014 Post & Go: Winter Greenery – British Flora 3 February 18, 2015 Post & Go : Working Sail May 13, 2015 Post & Go : Heraldic Beasts September 16, 2015 Post & Go : Sea Travel November 16, 2015 Post & Go : Winter Fur & Feathers February 17, 2016 Post & Go : Royal Mail Heritage: Transport September 14, 2016 Post & Go : Ladybirds November 14, 2016 Post & Go : Hibernating Animals February 15, 2017 Post & Go : Royal Mail Heritage : Mail by Rail June 5, 2017 Post & Go : Machin Anniversary 1967 – 2017 September 13, 2017 Post & Go : Royal Mail Heritage : Mail by Air January 23, 2018 Post & Go: Game of Thrones February 14, 2018 Post & Go : Royal Mail Heritage : Mail by Sea September 12, 2018 Post & Go : Royal Mail Heritage : Mail by Bike