What nuclear weapons in Belarus would change for Britain

A Belarus deployment would affect Britain mainly through allied air planning and deterrence, because Belarus has no coast and Britain then lacked a fielded land- or sea-based ballistic-missile defence.

Question

How would deploying nuclear weapons in Belarus affect Royal Air Force and Royal Navy strategy?

Short answer

Only indirectly: the RAF would support exposed eastern allies, while Britain's principal answer remained deterrence rather than a deployed ballistic-missile shield.

Notes

Belarus does not create a new naval theatre because it is landlocked. Any direct RAF involvement would therefore be tied to support for Poland or other regional allies. Britain did not then field a land- or sea-based anti-ballistic-missile system able to answer the deployment defensively. The strategic effect falls instead on alliance planning and the credibility of Britain's nuclear deterrent.