Well perhaps March 21st. Carrot seems not to be working withe Dark Sky now but does with other sources.
In the UK the DarkSky source data also appears better.
Unfortunately the MetOffce app is not good.
Maybe on Apple devices. There's no option on Android devices to choose the API. Just a button to refresh and another that gives witty replies if you press it.
I don't have an option to pick my data source. Theres just a "retry" button