You asked
How many Road Traffic Collisions (RTCs) occurred during each of the last 5 years, 2011 to 2016. and what percentage of each of the periods had a HGV involved in the RTC?
How many in 2011 - 2012?
How many in 2012 - 2013?
How many in 2013 - 2014?
How many in 2014 - 2015?
How many in 2015 - 2016?
We said
Thank you for your request. I can confirm the requested information is not held by the Office for National Statistics. We believe that the Department for Transport may be best placed to provide the information that you require.