Why did Singapore fall in the fall of Singapore?

The British had been overconfident that the Japanese would attack from the sea and thus pointed the naval defenses towards the sea. They even described Singapore as an "impregnable fortress". Moreover, the weapons that the British had were far weaker than those of the Japanese. The British found it unnecessary to use tanks in the jungle while The Royal Air Force could offer the ships no protection as their planes had already been destroyed by the Japanese. Hence, the battleship "Prince of Wales" and the battle cruiser "Repulse" were sunk by fast Japanese torpedo bombers. The British soldiers in Singapore were recruits, with little fighting experience. To their disadvantage, Lt. Gen Percival, leader of the British forces, was less experienced in jungle warfare compared to Japanese Lt Gen Yamashita.