Unfortunately in this era of "claim culture" people are almost encouraged to claim for whiplash type injuries.
About 4 years ago my daughter was hit by a car that came out of a side road and sent her car spinning across the road.
Luckily she was not badly injured but she did have genuine neck and back pain that caused her problems sleeping and walking and she had to have a number of weeks off work.
She reported the accident to the insurance company, and the very next day got one of these "had an accident that was not your fault" type phone calls.
Seems the insurance companies are paid to pass on details of accidents to these claim companies.
In the end my daughter did get a few thousand pounds, though her pain did go on for a number of months.
Sadly there are people who deliberately CAUSE accidents at roundabouts by starting to pull out, then stopping, and hoping a person goes into the back of them.
They then get out the car holding their neck and claiming they have all sorts of neck and back injuries.
This type of fraud seems very common amongst members of a certain ethnic minority group.
http://duncangibbins.co.uk/personal-injury-compensation/whiplash-injury-compensation-claims-3/
http://www.bodyshopmag.com/news-prison-sentence-for-birmingham-whiplash-fraudsters.aspx
http://www.telegraph.co.uk/motoring/news/9113220/Crash-for-cash-mother-jailed-leaving-behind-baby.html