Youngest double toppers

According to Official Guinness Records,

McFly (UK) are the youngest group to top the UK charts with two albums. They completed the double on 10 September 2005 with 'Wonderland'.

For a complete list of 2005 records, please visit 2005 Guinness Records in United Kingdom.

Other United Kingdom records that might interest you:

• Most Plasticine used in a feature film
• Most oysters eaten in three minutes
• Fastest 100 m by a pantomime horse (team - female)
• Fastest circumnavigation of Great Britain by powerboat
• Lowest heart rate
• Largest simultaneous dog stay
• Smallest multimedia player