Baffled Confused

I have transferred £1260 of my personal allowance to my wife through the marriage allowance. My income is usually below £11,310, but due to the increase in savings interest rates I'm not sure if it will go above that this year, or if it might possibly go above the personal allowance level of £12570. As I'm not sure, do I have to cancel the Marriage Allowance transfer now, or can I wait to see what my income is at the end of the tax year? As this level of income will only be temporary, can I leave the Marriage Allowance in place? If so, can I still benefit from the personal savings allowance and savings starting rate?