In the UK - the answer generally speaking is "yes". The Highway Code requires you to keep a safe distance behind a vehicle in front such that if that vehicle has to stop - even in an emergency - you have sufficient time to react and stop in time to avoid a collision occurring.
Notably there are a couple of exceptions:
1. In the UK there is an insurance scam starting to develop which involves a vehicle packed with individuals pulling in front of a car and slamming on the brakes to actually cause a collision. in such circumstances and if it can be proved the driver that collides with the one in the front should be found to blame.
2. The motorway scenario - again a vehicle can legitimately pull in front of vehicle in the near lane, but if that vehicle manoeuvres too quickly leaving too small a gap and brakes suddenly it is likely the driver behind will not be found to be At Fault.
yes
Yes, you are. It will be viewed that you were following too closely.
If you are hit from behind it is usually always the guy that hit you that is at fault unless you were in reverse backing up
is fault of car behind the second car not yours
The car in the back is usually at fault in a rear end collision. The only exception would be if the car in front were backing up. The car in back is at fault for hitting you ,but if you are pushed into the car in front of you you are at fault for hitting that car.
The car that hit you from behind.
It is their fault.
The car that is in motion is ALWAYS at fault.
The car behind you
you are at fault
You Dummy!!
If you changed lanes and hit a car in the lane you are trying to get into you are at fault.