@AMBxx Re: Roaming - just don't care
Sounds like you're on a really naff O2 tariff. On our O2 business contract, cross-net mobile calls are the same as O2<>O2 mobile calls and are included in our bundled minutes.
Are you sure you're not calling any 07 personal numbers? These do cost an arm and a leg and usually aren't included in any bundles.