What Cunningham might change at Singapore

How might the Singapore campaign change if Andrew Cunningham were in command?

He would probably coordinate the defense more firmly, pull back earlier when necessary, and secure the reservoir, making the Japanese position far more precarious.

Cunningham is presented as energetic enough to impose a single plan on competing commands and pragmatic enough to withdraw from the peninsula before a failing position consumed the army. Most importantly, he would be unlikely to leave Singapore's reservoir unsecured; control of clean water mattered because the Japanese force was already short of supplies and close to operational exhaustion.