The 4,274,300 sales place the record fifth on the list of biggest selling albums of all time in the UK, along with What's the Story Morning Glory by Oasis (fourth), Abba's Gold - Greatest Hits (third), SGT Pepper's Lonely Heart's Club Band - The Beatles (second) and Greatest Hits by Queen (first).

21 has sold an average of 20,000 copies per week over the past four weeks, the total number of sales is expected to increase when this week's chart ...