I found
Vodafone Red news release from 6 September 2012.
There's bit definig unlimited texts and calls:
Unlimited means unlimited
Vodafone Red plans offer unlimited calls to all UK mobiles – not just other Vodafone customers – and standard UK landlines, with no restrictions on how long a customer can talk or how many people they call. All new and upgrading customers who sign up to a Vodafone Red plan will also be able to take advantage of Data Test Drive, giving them as much internet as they like to use however they like, for the first three months so they can fully explore what their device has to offer. At the end of the three month period we’ll let them know exactly how much data they’ve used and whether the plan they’ve chosen suits their needs. They will also be able to draw on the expertise of our Tech Team, both in-store and on the phone, and take advantage of Vodafone’s innovative RED Box device, which will transfer contacts, text messages and other content to their new phone.
Vodafone Red plans include unlimited calls to UK mobiles on any network and landlines (starting 01, 02, 03) and unlimited standard UK texts. It does not include calls to premium rate, 08 and directory enquiry services. There is no ‘fair usage’ policy for unlimited calls and texts but our terms and conditions state that customers are not allowed to sell all or any part of our services to anyone else and we reserve the right to disconnect customers who are engaging in fraud, criminality or activity which would damage or affect the operation of our network or services. Both Red and Red Data allow customers to use VoIP and tethering.