Ban single use plastics in UK supermarkets

I'm ten years old and am really concerned about how much plastic we all use. My thinking is that once you have paid for your groceries to leave any plastic behind at the till and this might make the shops think twice about packaging. I would like to speak to my local MP and put more pressure on parliament to act. So if you like my idea please sign this petition. Together we can help to ban single use plastics around the world and save our sea creatures!