Kitchen worktop pieces (King's Lynn PE30)

This is new dappled grey 28mm kitchen worktop pieces that might be useful for shelves, top of cupboards in a shed or garage etc. seems a shame to put them in landfill
Appropriate sizes
22 x 20 ins - 56 x 50 cms
24 x 24 ins - 61 x 61 cms
18 x 37 ins - 46 x 94 cms