Australia's no follow-on policy

14.29 - Australia's percentage of enforcing the follow-on when they've had an opportunity to do so since 2004. On the last seven such occasions, they've only enforced it only once, against New Zealand at Wellington, after inclement weather had ensured that only two innings had been completed going into the final day. Earlier, Adam Gilchrist had twice turned down the opportunity to make India follow on in the 2004-05 series, while Ricky Ponting followed that example against New Zealand, Pakistan and West Indies over the next couple of seasons.

17.29 - Stuart Clark's bowling average in Tests. This is his fifth Test, and he has already taken 24 wickets. (Click here for the summary of his previous four matches.)

18.24 - Glenn McGrath's bowling average against England in their first innings. Of his ten five-fors against them, eight have come in the first innings.

18.33 - Kevin Pietersen's average against McGrath in Tests. In 100 deliveries, Pietersen has scored 55 runs off McGrath and been dismissed by him three times

47 - The highest partnership in England's innings (between Ian Bell and Geraint Jones, for the sixth wicket). In the Australian innings, there were six stands of 50 or more

445 - Australia's first-innings lead at the Gabba. It's the fourth-highest in all Ashes Tests, behind England's 702 at The Oval in 1938, and Australia's 504 (Brisbane, 1946) and 453 (Headingley, 1993).