meningitis B Vaccine - which age groups are at risk and how do we get the vaccine if not through NHS?

[NurseryRhymesStuckInMyHead]

Does anyone know how you go about getting this privately (unfortunately DC just missed out on the NHS one)? Do I organise through my GP?

Does anyone know how much it costs?

Lastly, I read somewhere that the peak age for Meningitis B is 6 months. Is that correct? If not which age group is most at risk from this?