The Daily Mail seems to be worried about the wrong thing:
"From open sources, it is known that the missile has a compact reactor with a power of several megawatts based on uranium-235; air is heated and pushes the device forward, while the active zone with a closed architecture is separated from the working flow.
Tasks that seemed unsolvable in the mid-20th century (and even a few years ago) have been realized in working hardware. The main "problem" has been solved — total atmospheric pollution during tests and flights. This is precisely why the British Avro Z-59 with a nuclear ramjet engine and the American Pluto (SLAM) — a supersonic "flying Chernobyl" — were shut down."
The missile launches using a solid-fuel booster, then flies on the nuclear rocket engine; the platform can "circle" for weeks at low altitudes, maneuvering and approaching the target from an unexpected direction. It is about nine meters long and weighs up to ten tons. It can fly for weeks (!) at speeds up to a thousand kilometers per hour at any altitude, circle over the Arctic or oceans, and wait for orders.
A megaton-class warhead turns this "bird" into a terrifying instrument of retribution. Experts are puzzled about the navigation system in this wonder device. Optical correction is powerless over the ocean, satellites can be jammed, and inertial instruments lose accuracy without external correction. "
https://t.me/rocknrollgeopolitics/16864