isis
What are you talking about? An earthquake in NOT a tsunami!
Yes we would know about an Eartquake and it's location and time, although we would have no warning of an Eartquake.
How would we have any warning about the approach of a tsunami in the UK. I keep telling you, WE DO NOT HAVE A TSUNAMI WARNING SYSTEM IN UK WATERS, we just have a seismic network for detecting eartquakes! The only warning of a Tsunami would be if it hit another country before us and the UK government had time to warn the UK population.