The information requested is not available.
However, Table RAS50001, in the DfT publication “Reported Road Casualties in Great Britain: annual report 2010” shows the number and proportion of reported personal injury road accidents which had “Distraction in vehicle” recorded as a contributory factor, in Great Britain in 2010. Table RAS50001 can be found using the following link:
Note that Contributory factors are reported only for injury road accidents where a police officer attended the scene and reported at least one contributory factor. These factors are largely subjective, reflecting the attending officer's opinion at the time of reporting. It is recognised that subsequent enquires could lead to the reporting officer changing their opinion.