README: Improve licence section.

README.md

@@ -237,7 +237,7 @@ In no event shall the GeoFurlong author be liable for any claim, damages or othe
 
 ### Licence
 
-All data outputs generated by the GeoFurlong tools are released under a permissive [CC BY Creative Commons Licence](https://creativecommons.org/licenses/by/4.0/). This licence allows reusers to distribute, remix, adapt, and build upon the material in any medium or format, so long as attribution is given to the creator. The licence allows for commercial use. however it should be noted that the GeoFurlong data is aggregated from Network Rail and Ordnance Survey data, both released under [Open Government Licences](https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/), and these contributing licences must be respected.
+All data outputs generated by the GeoFurlong tools are released under a permissive [CC BY Creative Commons Licence](https://creativecommons.org/licenses/by/4.0/). This licence allows reusers to distribute, remix, adapt, and build upon the material in any medium or format, so long as attribution is given to the creator. The licence allows for commercial use, however it should be noted that the GeoFurlong data is aggregated from Network Rail and Ordnance Survey data, both released under [Open Government Licences](https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/). These contributing licences must be respected.
 
 The project's source code is released under the permissive [MIT Licence](https://opensource.org/licenses/MIT) with a view to benefitting those working in the railway environment and foster further innovation.