The M4 Motorway (Slip Roads at Junction 45 (Ynysforgan), Swansea) (Temporary Prohibition of Vehicles) Order 2018 / Gorchymyn Traffordd yr M4 (Ffyrdd Ymuno ac Ymadael wrth Gyffordd 45 (Ynysforgan), Abertawe) (Gwahardd Cerbydau Dros Dro) 2018