*Post Office research conducted among 2,082 UK adults online (19-21 February 2021) by Yonder (formerly Populus) found that 42 per cent overall kept hold of leftover holiday currency. Based on the latest published ONS figures (June 2020) which show an UK adult population of 54.1 million, this means that 22.72 million adults are holding leftover cash. The research also found the average amount of foreign currency to be £154.70. The total ‘cash stash’ of £3.5 billion is calculated by multiplying 22.72 million adults by the average of £154.70.
**Post Office research (19-21 February 2021): when asked what they did with leftover cash, 1,728 qualified to answer this question as 18 per cent of the survey sample did not travel abroad and therefore had no foreign currency. Of the 1,728 who have travelled abroad on holiday, 51 per cent kept hold of their currency.