I've had two calls from the following number: 0845 2453200. I didn't pick up.
A quick google pulled up a couple of results, one from the Vodafone forum itself (see here)
According to the above url the forum admins confirm it is from Vodafone but that partly contradicts what has been said over here.
Anyhow, have any of you been plagued recently with Vodafone cold calling you?
Quite annoyed that they are cold calling me.