The ONS has published it's annual data report on divorce trends in England and Wales which can be found here:

This highlights two areas in need of reform:  

whilst divorce is on the increase, it is still not as high as it's 2003 peak which means that there are increasing numbers of cohabiting couples without appropriate legal protection; and 

 unreasonable behaviour remains the most common ground for divorce meaning that couples who want an immediate amicable separation are left with no choice other than to divorce on a fault basis.

Resolution have been campaigning for reform in both areas of the law with overwhelming support from the professional community and  commentators.