ID this plant please

thainice

Grateful if anyone can id this plant for me as it is taking over the garden!  It's about 2 feet/600mm in height and width is endless!  Many thanks.

Sandygarden

St John’ Wort, Hypericum. Not sure which one though.

Joy*

Hypericum I think.

thainice

Thanks so much. This one has been puzzling me for some time.  Now all I have to do is find out the best way to 'tame' it!