 The episode was filmed between October and November 2007 in the sixth production block of the series , alongside " Exit <unk> " . The sequence of Jack , <unk> and Owen leaving for Gwen 's wedding was recorded at Roald Dahl <unk> on 25 October 2007 . A number of locations were used for the wedding venue . Producer Richard Stokes notes that " it felt like we were organising a real wedding but one that was being shot in about five different venues " . Director Ashley Way states that in directing the wedding scenes , the production team had to make sure that the colour scheme co @-@ ordinated in regards to aspects like the <unk> costumes and the flower patterns . Costume designer Ray <unk> experienced difficulty <unk> a <unk> wedding dress to accommodate the nine @-@ month baby bump worn by Eve Myles . He remarks that in trying to source three such dresses from <unk> shops in Cardiff he was regarded " as if I was the biggest sinner in the world " and ended up designing the dress worn by Gwen himself . 
