Defra has a lot of data. Its roles within farming, the rural economy, and management of the natural environment mean it collects all sorts of data about all sorts of geographical features, natural phenomena, agricultural activity, and much more besides. It’s an extremely broad data set, with specific collections that can be very niche.
The open data project has begun with an accelerator programme, designed to get at least 8,000 separate data sets out into the public domain within a single year. Parts of the LIDAR data set, for example, have been available for free non-commercial use since late 2013.