fix link to data portal

README.md

@@ -145,7 +145,7 @@ Awesome software projects sub-categorized by focus.
 - [Poseidon NW Australia](https://drive.google.com/drive/folders/0B7brcf-eGK8Cbk9ueHA0QUU4Zjg) – Interpreted 3D seismic (32bit) including reports and well logs
 - [World Stress Map](http://www.world-stress-map.org/) – A global compilation of information on the crustal present-day stress field
 - [NOPIMS](https://nopims.dmp.wa.gov.au/nopims/) – Open petroleum geoscience data from Western Australia made available by the Australian Government
-- [UK National Data Repository](https://ndr.ogauthority.co.uk/dp/controller/PLEASE_LOGIN_PAGE) – Open petroleum geoscience data from the UK Government (free registration required)
+- [UK National Data Repository](https://ndr.ogauthority.co.uk/) – Open petroleum geoscience data from the UK Government (free registration required)
 - [Athabasca Oil Sands Well Dataset McMurray/Wabiskaw](https://ags.aer.ca/publication/spe-006) – Well logs and stratigraphic picks for 2193 wells, including 750 with lithofacies, from Alberta, Canada
 - [ICGEM](http://icgem.gfz-potsdam.de/home) – Hosts gravity field spherical harmonic models and provides a webservice for generating grids of gravity functionals (geoid, gravity anomaly, vertical derivatives, etc)
 - [TerraNubis](https://terranubis.com/datalist/free/) – The new _Open Seismic Repository_, includes the classic F3 and Penobscot seismic volumes (which both also have wells and other data assets).