Not sure if this would be any use to people on here ????
But
https://www.screwfix.com/p/smith-locke-ground-wall-anchor-black-large-160mm/8955p
With screwfix offering this at a decent price .... may be worth a try
But
https://www.screwfix.com/p/smith-locke-ground-wall-anchor-black-large-160mm/8955p
With screwfix offering this at a decent price .... may be worth a try