What are LNB doing with Halsbury's is it in force?

Yesterday one of my colleagues noticed that something weird has happened with Halsbury’s Is It In Force, from the Spring 2007 edition instead of it detailing the commencement details of Statues and their subsequent amendments it now only provides their commencement details.

Information about the repeal and amendment of Acts can be found in Halsbury's Statute Citator. Surely this means it should now be called Halsbury’s when was the statute originally enacted rather then Halsbury’s Is it in Force, very confusing...I cant see why Butterworths would make this change!

I'll give a prize* to anyone who can correctly identify the number of Halsbury's used in this post.