Drain the tuna, empty into a bowl and break up.
Place the pasta in salted boiling water and cook according to the instructions on the packet.
Empty the tomatoes into a heated saucepan, add in the herbs, a pinch of salt and pepper. Bring to the boil and simmer for 2 minutes.
Drain the water from the pasta then pour into the pan with the tomatoes, stir, add a squeeze of lemon and serve.