my dishwasher leaks (Hotpoint BF 1620)?

My dishwasher is leaking from the bottom of the door, when its washing. There are lots of bubbles that start leaking from the bottom of the door. The machine is approx two years old but has only been used a max of 40-50 times. When we open the door there is a lot of water and bubbles in the base of the dishwasher. We have to then empty it out with a jug in order to restart the machine without any further leaks.