1.23 million copies of Activision’s Call of Duty: Modern Warfare 2 have been sold in the UK, according to GfK Chart-Track.

Pointing out the obvious, ELSPA director Michael Rawlinson said, “These first day sales figures are astonishing and clear evidence that videogames are now mainstream in the UK,” before adding, “our form of interactive entertainment has completely come of age.”

GfK Chart-Track estimates that Activision has grossed £47 million from sales of Modern Warfare 2 thus far, shattering the previous record set by Rockstar’s Grand Theft Auto 4, which sold 631,000 copies.

When data closer to home becomes available, we'll let you know.