Artificial plastic grass is terrible for local wildlife and terrible for the environment and Gardenis.co.uk will never sell it. In fact I'd rather close the site down than have to sell it. Unfortunately, it's appearing in more and more gardens, but all will eventually in landfill.
Channel 4 has done a news feature which explains more about it here;
Apart from the environmental issues
1. It stinks if you have cats or dogs.
2. It's expensive, you could buy so many nice plants instead!
3. It's fake and ugly. This is real life not Minecraft.
4. It's a nightmare to remove as underneath you will likely find a layer of construction dust, plastic membrane liner and a layer of gravel.
5. It gets super hot.
A few things Gardenis.co.uk will also never sell;
Fake plastic flowers
Peat based compost