Thanks for your question.
I'm very sorry but you do not qualify to apply for indefinite leave to remain (ie. Permanent residence) or for naturalisation as a UK citizen.
IN order to apply for naturalisation a person must first hold indefinite leave to remain. In order to apply for indefinite leave to remain you must have a significant period of residence in the UK after having entered on a visa which permits application for indefinite leave to remain to be made.
Muilt-entry business visitor visas do not allow those holding them to apply for ILR regardless of the time spent in the UK I'm afraid.
Your employment contract with a British contract does not change the fact that a period of residence is required.
If your ultimate aim is to obtain ILR then you will have to come here and work under one of the worker categories and complete a period of residence here (usually 5 years):-
I am very sorry it could not be better news.
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