Just found this on the Barclays site:
Security offers for PCs and mobiles
We are offering Kaspersky Mobile Security suite (RRP £14) free of charge if you use Online Banking.
Kaspersky Mobile Security
* Helps defend against mobile theft and fraud.
* Offers personal data protection.
* Comprehensive protection from: viruses, trojans, worms, spyware, backdoors, keyloggers, rootkits, phishing and spam/hacker attacks (two-way firewall).
* Protection against SMS spam.
* Real-time antivirus scanning of all incoming files and connections.
* On-demand antivirus scanning of the smartphones internal memory and extension card.
* Full antivirus scans on a schedule defined by the system administrator.
* Choice of integrated IP firewall protection levels.
* Free technical support.
Further information on the product or to check if your handset is compatible, please visit the Kaspersky website*. See terms and conditions.
Please note, this will only work for Barclays iBank customers. It won't work for Barclaycard.