depends what check in time it says for 2nd flight leaving from north
does seem a bit of a squeeze - might be worth to see if you can get luggage taken off first or even taken striaght to 2nd flight, but i would worry that if i hadnt seen it then it might not get on plane,if i didnt put it there iykwim
the train takes bout 3 mins and there are signs pointing you to the train bit - very easy to go fromone terminal to other
we are off there later today and once put in luggage will prob eat at garfunkels - very nice food there