TFL hoards £300m of unclaimed money
If you have an old oyster card you no longer use you can claim any money left on it. Apparently TFL have over £300m of unclaimed cash which they are urging customers to reclaim. https://www.independent.co.uk/news/uk/home-news/tfl-dormant-oyster-cards-money-stored-refund-reclaim-deposit-transport-for-london-a8424336.html