Below is a map of Suffolk showing the Watsonian vice-counties boundary of West and East Suffolk in red, used for recording flora and fauna within the county, and the administration boundary in blue.
Further information can be found in an article in the Suffolk Natural History Transactions by Howard Mendel describing the differences:
Mendel, H. 1984. A tour round the vice-counties of Suffolk. Trans. Suffolk Nat. Soc. 20: 1-9.
Thanks to Martin Sanford of SBRC for supplying the above map.