FYI
Been using these for a few weeks now with great success.
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says; "Universal plug for fixing into any wall, ceiling or floor. For use in concrete, stone, plasterboard, brick and blockwork. Unique design with expansion throughout the length of the plug. Expands at the top giving instant grip. Anti-rotation features prevent spinning in the hole".They do just what they say they do. I've found them excellent for block, dot & dab, plasterboard or solid walls.
They are going to be my standard plug as soon as I've used up existing stock.