Why Type 45 uses Sylver while Type 26 and Type 31 receive Mark 41

Why do newer British frigates use Mark 41 vertical launch cells while Type 45 destroyers use Sylver?

Type 45 inherited the European Sylver air-defense system from the Horizon program, while Mark 41 offers newer frigates broader weapon compatibility and attractive quad-packing options.

Type 45 emerged from a European air-warfare frigate program whose missile system used Sylver, a launcher optimized for very rapid air-defense shots. Mark 41 is more general-purpose and supports a wider family of weapons, including quad-packed missiles and potential land-attack options. The Royal Navy did not simply add that strike capability to the destroyer because officials argued that surface-launched land attack could weaken the justification for expensive attack submarines carrying the same mission. Newer frigate programs now value the flexibility of Mark 41, while Type 45 is instead receiving additional Sea Ceptor capacity around its existing launcher architecture.