Karen Walsh

I have 2 pt jobs, and I'm hoping for help as the new minimum wage has increased and I will be over the £12,570 threshold from both jobs. 1st job: 2 x days per week, 16hr contract. I only receive 15hrs paid at £11.44 p/h as I don't get paid for meal breaks. 2nd job: 2 x nights per week, 11hr contract. I only get 10hrs 15mins paid at £12.02 p/h as I don't get paid for meal breaks. I have roughly calculated that my gross income per annum for both jobs will be approx £15,250. In total hours paid between the 2 jobs is 25hrs 15mins. How do I find out which job gets taxed and when from? Also what about National Insurance, am I now eligible to pay that? Thanks