Not necessarily. It depends on how your vote and that of opposition parties is geographically spread. 2024, and to a lesser extent 1997, were a perfect storm for the Tories, while in 2017 the Tories had 42.3% but still had no overall majority in the HoC.

Also Höcke, the leader of the AfD in Thüringen, failed to win his constituency seat where FPTP is used.