There’s a history in the Navy of reusing great names of the past. Greek heroes were a common theme, Ajax, Achilles, Agamemnon were historically cruisers and battleships, a role now taken by SSN and SSBNs as the most powerful ships/vessels in the navy inventory.
Agamemnon was one of the most powerful kings of Greece in ancient times, famous for the sacking of the supposedly impenetrable city fortifications of Troy using stealth and guile to do so….I think it’s a pretty fitting name for one if the worlds most stealthy predators.
The damage to the conning tower isn’t particularly serious, it’s a free flood area and the majority of the sensors and masts are aft of there. It’s likely damaged the tower sonar and the wet bridge, but in reality, it’s little more than casing damage. The damage to the forward hull is again likely to be casing and mooring fixtures, possibly the forward escape trunk. She’ll be fine to return to Faslane/Davenport once she’s been inspected.