I discovered the issue, it did not relate to the code but actually some start-up parameters. Using Tomcat7w.exe I noticed in the Java tab, the following lines:
-Dfile.encoding=UTF-8
-Dsun.jnu.encoding=UTF-8
I removed these lines, restarted the Tomcat service and everything worked, therefore no code alterations were required.
Thank you to all that responded :-)