Plasnewydd (Cardiff) result:
LDEM: 48.1% (+15.4)
LAB: 34.8% (-2.0)
PC: 6.8% (-5.3)
CON: 4.4% (-1.2)
GRN: 3.6% (-9.3)
UKIP: 2.4% (+2.4)

— Britain Elects (@BritainElects) September 20, 2016

Updated local by-elections gains/losses chart including latest LAB loss overnight pic.twitter.com/kdWuq4UpTF

— Mike Smithson (@MSmithsonPB) September 21, 2016