THE new polymer £20 note entered into circulation in February 2020. Here's everything you need to know about the new £20 note, the famous artist featured on it and what happens to old paper notes. 4 The new £20 note went into circulation on February 20, 2020 - and it's made from plastic When was the new plastic £20 released? The new plastic £20 notes entered into circulation on February 20, 2020 and will eventually replace the older paper £20 notes we use. The new note is made from a plastic polymer like the new £5 and £10 denominations, which is said to be more durable, cleaner and secure than paper. Who is JMW Turner?