Why the Royal Navy retained proven boilers

What steam pressures did Royal Navy plants use, and why not adopt higher-pressure systems immediately?

Britain favored proven mass-produced boilers for rapid, reliable construction even where turbines left scope for later higher-pressure upgrades.

British turbines could accept more powerful steam conditions than the installed boilers supplied. The Royal Navy retained familiar boilers because they were already in mass production and crews knew how to operate them. That choice accelerated fleet output and reduced the disruption of adopting a new plant during rearmament. A later higher-pressure boiler upgrade remained possible in theory, although wartime demands rarely left room for it.