The new banknotes are cleaner, stronger and last longer than the old paper notes.
The most valuable £5 notes - serial numbers and the 'AA' codes to watch for - Mirror Online
Surprising Number of Polymer £5 and £10 Banknotes Replaced Due to Damage - CoinsWeekly
New 5 pound note hi-res stock photography and images - Alamy
How the £5 note has changed over 200 years
Britain's 5-Pound Note Will Now Be Made Of Plastic
Britain's New 5-Pound Note Is Chewable, Washable and Harder to Fake - The New York Times
Millions of plastic £5 and £10 banknotes replaced due to damage
How the £5 note has changed over 200 years
When did the old £5 notes go out of circulation and why were the new polymer notes introduced?
Bank of England will retain plastic £5 note, despite vegan protests, Bank of England
What is the new five pound note made of and everything else you need to know - Berkshire Live
Six-month warning over £20 and £50 paper notes
Bank of England £10 note - Wikipedia