There is NO treatment for the subtle neck injuries that are common in this situation. We must self-treat with changes in posture and behavior. It takes months for the upper neck to find stability after the ligaments have been stretched.

There is NO imaging either.

BBJ is the worst thing for an unstable neck.

Notice, I use the term Subtle Neck Injury. They are subtle because they do not manifest common neck injury symptoms. No stiffness. No pain. No loss of range of motion. No image abnormalities.

What subtle neck injuries do is get inflamed when stressed or aggravated causing changes in blood flow to the brain and nerve function.

UK/NHS will not have any idea about subtle neck injuries. There might be a chiropractor or physio who does. Upper Cervical chiros help some. Most therapies are too aggressive.

That is why I say we have to treat ourselves with discipline with posture, especially when sleeping when the neck muscles are relaxed.

I get my safest sleep in a recliner chair.