some_days_are_dry_some_days_are_leaky

Hi, I am employed in the UK using an employee of record, but working full time for a US company. I have been granted a certain amount of Incentive Stock Options, and there is a possible sale of the company of the horizon which might trigger my Options. While ISO are quite straightforward for US employee, I am not quite sure how I will be taxed in the UK and what actions I need to take before and after the sale of the company: where can I gather this information?