It changed in the course of the years for British English. According to The Oxford spelling dictionary, Robert Edward Allen, 1986, p. 49, the British-English hyphenation is
com|mun¦ic|at|ing
A slightly newer New Oxford spelling dictionary, Maurice Waite, 2005, 3rd edition, p. 97 says
com|mu¦ni|cat¦ing
The bar | denotes a preferred division point (you can almost always divide there), and the broken bar denotes a secondary division point (e.g. for narrow columns); their exact definitions are stated in the two dictionaries.
Question: What were the reasons for the change? Is any version wrong?