BBC1 like these overruns as they enhance the ratings. The 8.30pm and 9pm 5 minute periods will be inflated as you effectively have the audiences for two shows watching - the show supposed to be starting and the show still running. It won't be quite as good as usual tonight as Dickensian isn't as big as the shows normally involved (it always works a treat with SPOTY/Apprentice and ITV did it and got a big peak with X Factor/Downton a couple of years ago) but certainly Dickensian will get a nice enhanced rating, either full slot (due to the EE overrun) or tapechecked (due to Sherlock viewers tuning in at 9pm). It's a smart thing to do really, albeit annoying for those with PVRs that don't adjust for it.




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