All clean plastic bottles, pots, tubs and trays can be recycled in your black box or recycling bank for mixed containers as long as they did not contain pesticides or motor oil. We can't accept any other plastics for recycling but plastic carrier bags and packaging films bearing the 'recycle with carrier bags at larger stores' logo can be recycled at most supermarkets.
https://www.richmond.gov.uk/services/waste_and_recycling/plastic_recycling