Scotch-Fix Mirror Double-Sided Mounting Tape, 19mm x 5m - For Indoor Use, Humid Areas, For Mirrors in Bathrooms and Kitchens, Works on Ceramic, Tiles, Finished Wood, Metal, Glass and Painted Walls :
Scotch Indoor Mounting Tape, Heavy Duty 1'' x 50'' 1 ea : Amazon.co.uk: DIY & Tools