With September now over, the weeknight 9pm slot average for the month was:
BBC1- 4.8m (Sep '09: 4.9m)
ITV1- 4.1m (4.2m)
BBC1 outrated ITV1 in the slot by the same margin as last year, although both channels were down 0.1m year-on-year.
The overall 2010 weeknight 9pm slot averages currently stand at:
BBC1- 4.6m (Jan-Sep '09: 4.7m)
ITV1- 4.2m (4.2m)
BBC1 lead the 9pm averages by 0.4m. Although ITV has I'm a Celebrity in November, I think +0.4m should be enough for BBC1 to keep the 9pm top spot come the end of the year especially with the return of The Apprentice and 4 more episodes of New Tricks.
BBC1 is very consistent throughout the week, with all days averaging between 4.2-4.8m. Their strongest weeknight 9pm slot is Fridays with 4.8m, due to the dramas they've aired this year. It's been a good turnaround there because in 2008 and 2009, Fridays used to be their second weakest night for the 9pm slot. ITV1 is more erratic, with Mondays and Wednesdays averaging 5.0m but the others averaging below 4m (Tuesday as low as 3.4m). If there's one positive for ITV1, it's that they've closed the 9pm gap on BBC1 in the last couple of years; the gap between the two broadcasters at this same stage in 2008 was 0.9m.