There website is misleading as far as the 07744 number is concerned.
The only network that still allows you to call 07744 numbers out of your inclusive minutes on some of there contracts is 02.( They will probaly start charging as well soon). T -Mobile have recently started charging for calls to these 07744 indirect access numbers and Vodafone,Orange,and 3 have done so for some while.
If you are looking to make intl calls out of your inclusive minutes visit
www.pre-dial.com click on free destination list.Where you will see real Orange and O2 Mobile Numbers you can use out of your inclusive minutes to some destinations.