Yes you will be. The current personal allowance for this year to 2013 is £8105, which works out at about £675 tax free a month, so if we do that on a yearly basis with the 2 jobs making a total of (just rounding up here for simplicity) £8714 - the remaining £609 of that will have 20% deducted off it, meaning you average take-home income a year from both jobs would be about £8593.
E: And the clarify, you being a student doesn't and NEVER will make a difference to whether you pay tax or not unless it's only strictly during the holiday - if it's work done all throughout the year, then as long as you earn over the yearly personal allowance, you pay tax.