So you know what you're looking at, in the default settings as I've published it, the x-axis is the reach, while the y-axis displays hours. So a station in the top right-hand corner would be an elderly male station, while a station in the bottom left would be a young female station.
The size of the circle is related to that service's average hours.
I used to have different settings, but unfortunately the Google charts have been changed, and I can't currently set defaults.
However all these settings are changeable. Just choose a measure from the dropdown and get the chart into your preferred format.
- To get started, hit the "Play" button in the bottom lefthand corner. You can also "scrub" the timeline by dragging with your mouse.
- There are stations missing. It's largely based on current "national" services and groups. In particular stations that have "been and gone" aren't included. Even then, I've still not included absolutely every current service.
- Note that figures are all based on 6m weighting when a lot of the services would ordinarily report on 3m weighting. But some of the groups do report on 6m, so I'm using the "lowest common denominator" here. There's a good argument for mixing 3m and 6m weights however.
- I've essentially ignored the various takeovers and mergers that have happened between groups. So "Global" goes right back to 1999.
- Some station definitions have changed over time. For example, Capital Network is very new, and Heart Network today is something very different to what it was five years ago as its composed of many more individual services.
- The chart is full interactive, and you can trace stations' shifts and movements.
- Stations in the same groups are the same colour.
- By selecting individual stations, you can track them over time, and can choose whether or not to leave trails.
- You can turn trails on for individual station selections and see their shifts. Selecting services dulls the others.
You can change what data is plotted by clicking on the x-axis, y-axis and size dropdowns.
- There have been a couple of minor methodology changes over time that this chart overlooks.
Disclaimer: I built this interactive view using data courtesy of DP Software and Services. Contact Deryck Pritchard for more information.