B&M – Merthyr Tydfil – Opening Hours & Store Details B&M Home Store occupies a position in Dowlais Top Retail Park located on Heads of the Valleys Road, about a 2.18 mile driving distance north-east from the centre of Merthyr Tydfil, in Dowlais Top (near Dowlais Primary School and Hebron Evangelical Church). The store chiefly provides service to patrons from the districts of Fochriw, Merthyr Tydfil, Dowlais, Rhymney, Pant and Dowlais Top. Here you’ll find opening times, store address details or direct number for B&M Merthyr Tydfil.