Boots – St Mellons, Cardiff – Opening Hours & Pharmacy Details Boots occupies an ideal space at 4 Strathy Road, approximately a 4.81 mile distance north-east from the centre of Cardiff, in St. Mellons (by Willowbrook Primary School). The store provides service mainly to the districts of Newport, Marshfield, Llanrumney, Trowbridge, St Edeyrn’s Village, Castleton, St Mellons and Peterstone Wentlooge. Refer to this page for the specifics on Boots St Mellons, Cardiff, including the hours of operation, address, phone number and other information.