Hey @PattemManohar thanks for responding. I tried your suggestion, but that did not do anything for me.
I am looking to use a shape map as well, so I believe I would have to add my own TopoJSON map (I have never done this) with the Postcode as the boundaries to use. I am looking to see if anyone knows if this type of map is available to use anywhere and if so how can get it, add it to my PBI report.
Have you managed to find a solution to your question on UK JSON maps?
If not, please find some links to other, absolutely fab tech geeks; like us, who have created some very useful map-related resources; and specifically, UK map files:
1) Do-It-Your-Self Option via the Geo Json site:http://geojson.io : here you can click and build your own poly shape over the top of a map. The site then lets you export the end result as a json, ready for uploading into Power BI, awesome.
2) David Eldersveld Git Hub Site: @deldersveld , David is like the father Chrismas of Json map files. David has built up a great library of GeoJson files for most of the worlds major countries and cities