This coin is from the second Tower of London £5 coin collection released in 2020. (First set released in 2019)
 
The full set of four £5 coins includes:
 
The White Tower
The Royal Menagerie
The Royal Mint
The Infamous Prison
 
Other coins in the collection sold separately. 
 
*Not released into general circulation*
 
Obverse: Jody Clark Queen Elizabeth II Portrait
Reverse: The White Tower with flag atop and arched window behind. Tower of London Mint mark.(designed by Timothy Noad)