The key changes include:
•Call connection fee on non-inclusive calls: Up from 12p per call to 12.5p per call.
•Calls to directory enquiry services beginning 118: Current and new prices vary depending on the number. Calls to 118 118, for example, will soar from 56p per call, plus 16p per minute, to £2.30 per call, plus £1.80 per minute.
•International calls: Calls to landlines in India, for example, will rise from 26p per minute to 27p per minute while calls to landlines in Spain will rise from 6p per minute to 8p per minute (plus connection fee). Calls to mobiles in India will rise from 46p per minute to 47p per minute, while calls to mobiles in Spain will increase from 22p per minute to 25p per minute (plus connection fee).

For the full list of price rises see the Orange price change PDF.
http://web.orange.co.uk/documents/ice/termsandconditions/home_voice_price_changes_19_september_2012.pdf