Overton does not currently support filtering for UCL outputs based on our internal data. However, it is still possible to generate this data if needed.
We recommend that if you want to look for policy documents citing research from a specific UCL unit, that you produce a list of papers using the InCites MyOrganisation data, export this from InCites, and then extract the DOIs. These can then be pasted into the "search by DOI..." field in Overton, shown below.
Overton will then produce a search results list covering all the matching papers in its database. Note that this is likely to be a smaller number than the output from InCites as not all papers are indexed in Overton.