For questions like this, I think you'd better look in the AIP of the relevant country. The GEN 1.5 section to be more specific.
For the UK, the information can be found here:
http://www.ead.eurocontrol.int/eadba...2013-12-12.pdf -- Para 5 (page 10 onwards, and particularly the table on page 11) seems the most relevant to your question. Although I have to admit it's a rather dense document.