CG76881 - Chattels: coins and bank notes
Coins and bank notes which are sterling currency are not chargeable assets, see CG12602.
Coins and bank notes which are currency of the issuing country are not treated as chattels, TCGA92/S262(6)(b). See CG78300+ for the treatment of foreign currency.
Only coins and bank notes which are legal tender are currency. Coins and bank notes which aren’t legal tender may qualify for the chattels exemption.
A collection of coins or banknotes is unlikely to be regarded as a set. However, if it contains examples of all the values or denominations issued in one year or during one reign or government, these will, themselves, form a set.