DVLA telephone number

Just got a tax reminder for one of the cars at work, did it over the phone because I find it oddly easier than via the internet. Anyway dialed the number and got told "This number has changed to" a 0300 number. At least it put me through, but come on this reminder's only just been published.

For anyone thinking they're using up old forms, the section that gives the number is printed onto the form rather than being part of the form itself. I wonder if anyone's told those in charge of the printing methods that the number's changed?