Clearly there is a political element in this, but that can't really be surprising
As the prior poster said, interest rates are not under direct gov control, and a decision by the BOE that helps get more money in peoples pockets is a) outside of gov timing, b) would not be as directly tied to an action of the conservative gov as this clearly is c) easier to specify "we are giving X people Y per year extra" d) helps a different subset of the population than an NI reduction helps.
As the prior poster said, interest rates are not under direct gov control, and a decision by the BOE that helps get more money in peoples pockets is a) outside of gov timing, b) would not be as directly tied to an action of the conservative gov as this clearly is c) easier to specify "we are giving X people Y per year extra" d) helps a different subset of the population than an NI reduction helps.