A customer has a designer mockup of a form button that shows a right facing triangle character after the main text, but I can't seem to get this showing. The offending markup is;
<input type="submit" value="Add to basket ▶" />
Ya you can use 100%
Content-Type: text/html; charset=utf-8
should be present.
The meta tag is ignored by browsers if the HTTP header is present.
Also ensure that your file is actually encoded as UTF-8 before serving it, check/try the following:
Ensure your editor save it as UTF-8.
Ensure your FTP or any file transfer program does not mess with the file.