This is an ongoing little project I've been messing with off and on over the last month or so.
British intelligence service (MI6) commissioned a low altitude penetration vehicle to offer nuclear first strike capabilities against their adversaries. It has the ability for Vertical Takeoff and Landing (VTOL), allowing the bomber to be deployed in secret underground facilities around the globe, without the need for elaborate, obvious landing strips. It sports stealth technology and can fly at hypersonic speeds. It fields a crew of 4 and is armed with 6 12kt nuclear tipped cruise missiles.
It's objective is to fly below the radar of enemy nations, deploy its nuclear payload and return if possible. Targeting command and government staff in the hopes of mitigating or eliminating a response in the event of a first strike nuclear attack.