Overview
- Reports this weekend showed all five operational Astute-class attack submarines are in port awaiting maintenance, leaving none ready for immediate patrol.
- The Ministry of Defence would not give specific availability figures but said British waters remain protected and pointed to the Submarine Maintenance Recovery Plan as the current response.
- Defence experts and former senior officers warn hunter-killer SSNs are the primary assets that screen Vanguard ballistic-missile submarines and patrol undersea cables, so their absence raises short-term risks to deterrent escorts and critical infrastructure protection.
- Analysts trace the bottleneck to decades of underinvestment, limited specialist dry-dock capacity at places such as Devonport, workforce and skills shortages, and constrained maintenance throughput.
- The navy is using stopgap measures including containerised workshops, short-term contracts and AUKUS maintenance in Australia while Programme Euston floating-dock design and SSN-AUKUS shipbuilding are advanced as longer-term fixes.