DK data

The Danish turbine-specific data is available from ENS, in their wind turbine register - the main data is linked in the body text, and monthly data by year is listed down the right-hand side of the page.

The 5-minute data fleet-wide data is available, by FTP only, from Energinet, and all the files zipped come to 6MB in total.

The 1-minute data is shown on this live Energinet chart, and as it's provided in a SOAP feed, one might think that it would be possible to create an automated scraper of that feed to archive the minute-by-minute data, if one felt that it might offer an interesting complement to the 5-minute data.

Using these, here are a couple of things I prepared earlier:
Capacity factors at Danish offshore wind farms and a paper showing that Denmark exports its thermal power, and practically none (0.1%-1%) of its wind power

GB data

The GB ROC data is available for 2002-2006 here, and for more recent data from the renewables register

Happy to discuss further, by email if you like: - andrew at my Eurotrib username here dot info