Just replacing the tube between the darlek cap on the coolant expansion tank and the top up tank. I am having trouble getting the hose clamp off the old tube where it connects to the top up tank. What type of clamp do they use?? Access is a bit fiddly and the bottom of the clamp looks crimped together. I have tried attacking it with various pliers and mole grips but cannot get it free. Any ideas?
This is the last stage of my thermostat swap and coolant change - i couldn't get all the air out of the system....after some studying i realised there was a hole in the tube between the two coolant tanks

Thanks
Tom.