When you tap the Internet App and the manual appears, are you able to see a 'Menu' icon located in the upper right?
If so, you may actually be running the web browser and it's that which is displaying the manual, then try the following:
- Tap Menu icon
- Tap Settings.
- Tap Home page.
- Ensure Home page is turned On. (Note the Current state which is indicated in the upper-left.)
- Tap (uncheck) Default.
- From the Enter URL field, enter the preferred home page URL
http://www.google.co.uk then tap Done (located in the lower right).