Here are the latest SIM only offers which are now live from Vodafone:

– 100 minutes, unlimited text x 30 day contract £10
SIM Cards: SIM-only contracts and mobile SIM cards - Vodafone

– 300 minutes, unlimited text plus 500MB Internet usage & BlackBerry Services (email) x 12 month contract £15
- 300 minutes, unlimited text plus 500MB Internet usage & 1GB Wi-Fi in BT Openzones x 12 month contract £15
SIM Cards: SIM-only contracts and mobile SIM cards - Vodafone