B&M – Western Avenue, Cardiff – Opening Hours & Store Details You’ll find B&M situated in a prime spot in Western Avenue Retail Park on Excelsior Road, about a 1.72 mile distance north-west of the centre of Cardiff (adjacent to Gabalfa of A48 / Western Avenue). The store is an added feature to the areas of Heath, Gabalfa, Whitchurch, Llandaff North, Cardiff Town Centre, Birchgrove, Civic Centre and Pontcanna. This page will supply you with all the information you need on B&M Western Avenue, Cardiff, including the operating times, local navigation, customer rating and more beneficial info.