Budget 2018: the chancellor announced changes to taxing gains made by non-residents on UK immovable property, confirming that non-resident CGT will be extended to disposals of all UK land and to UK property rich companies. 

 As first announced in the Autumn Budget 2017, from 6 April 2019:

Useful links:

Budget 2018 live highlights

Budget 2018 summary

External link

HMRC: Changes to taxing gains made by non-residents on UK immovable property