I have a lot of data I need to download, what is the quickest way of doing this in the User Interface, i.e. can I do a batch extraction?

Unfortunately we cannot provide a batch extraction mode at present under the User Interface.

In detail

However, if you select an output type of a plot instead of raw data then you will be taken to the graphics page. On the graphics page you can change various aspects of your request such as the location, probability level, emissions scenario, time period, temporal average and then click Save Data As to download the underlying data. This means you don't have to re-build each request from scratch and should speed up your extraction time.