I've decided to stop including BBC Weekend News in the chart. As that title covers all news shows at the weekend (regardless of time of broadcast), the earlier shows often don't make the chart, and I don't feel I can make a reasonable stab at an average, when the time and audience varies so widely as a result of that. Plus I don't think anyone is particularly arsed about it anyway. I've no doubt included it many weeks previously where it should have had a lower figure.
Ideally I'd like to at least consider excluding ALL news shows, but the truth is without them, I'd struggle to get the data on enough of the rest to fill a chart - of the top 50 individual shows last week, 17 were news broadcasts. Then when you include multiple episodes of the soaps, The Chase and (sometimes) The One Show, there wouldn't be enough info to make a Top 20. So I'll leave in BBC News at Six and Ten, as they are consistent, and I quite like them as a kind of bellwether.