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A 300% deposit bonus in the UK is an enticing offer for new players at online casinos and betting sites. This promotion allows users to triple their initial deposit, significantly boosting their bankroll and enhancing their gaming experience. For example, if a player deposits £10, they receive an additional £30 in bonus funds, totaling £40 to play with. However, it's essential to read the terms and conditions, as wagering requirements and eligible games may apply. This bonus can provide an exciting opportunity to explore various games and increase winning potential.