This UK sanctions regime is aimed at encouraging Russia to cease actions which destabilise Ukraine, including actions undermining or threatening the territorial integrity, sovereignty and independence of Ukraine.
It imposes asset freezes on those identified as being involved in destabilising Ukraine or undermining or threatening the territorial integrity, sovereignty and independence of Ukraine. This includes persons responsible for engaging in, providing support for, or promoting any policy or action that destabilises Ukraine or undermines or threatens the territorial integrity, sovereignty and independence of Ukraine.
There are also sectoral financial sanctions which prohibit and restrict specified activities, see here for more information. These include restrictions on dealing with transferable securities or money-market instruments and granting or entering into arrangements to grant loans or credit. For more information, please see this guidance on Russia sanctions.