I have just managed to put my thumb through the plastic tank on the far right hand side of the engine bay containing blue/green fluid. Am I right in assuming this is the coolant reservoir? And should it have been that brittle, considering that I put hardly any pressure on it? My problem is that I am due to drive back to Brighton tomorrow, which takes about 2 1/2 hours, and I am not sure if it is wise to drive the car with a dirty great hole in the tank. Obviously being the bank holiday I am not going to be able to get another tank in time. I have gaffa taped it over and driven down the road and I think it should be OK, however my dad is not so sure. Advice please!