ntl and telewest charge a lot to make international calls.
With
ntl international calls costs from 10p to 70p per minute, and only three countries are 10p/min (Canada, Ireland, USA)! Calls to international mobiles are even worse, with prices ranging from 40p to 95p.

You can see what ntl charge to call each country at the ntl tariff guide:
http://www.ntl.com/home/telephone/pd...pdf?1118404695
With
telewest it costs from 16.5p to 99p per minute, again three countries are at the lower rate! Calls to mobiles range from 16.5p to a whopping 119p/min!
You can see what telewest charge to call each country at the telewest tariff guide:
http://www.telewest.co.uk/pdfs/11038_TW_Tariff_Res.pdf
However, it's easy to call both landlines and mobiles in
many countries for the cost of a UK national call. That's only
3p/min daytime and
2p/min evening!
To do this:
1. Dial the access number 0870 794 6910
(at weekends dial 0844 570 6910 instead - 5p/min all weekend)
2. Dial your international number in full
(including 00 and the country code)
You are only charged for the cost of calling the access number, there is no other charge.
If you would like more information, visit this site:
http://justdial.atspace.com/
Dave