The *green bin* is for composting food & garden waste

Описание: Your green bin is for food & garden waste.

Food waste includes fruit and vegetable peelings, plate scrapings and fish and meat bones.

Collect your food waste in any container or use a kitchen caddy.
You can get a free kitchen caddy from the Council
https://www.scambs.gov.uk/foodwaste
If you want to line them - be sure to use the paper liners as the biodegradable plastic liners don't compost down quickly enough.