Yorkshire fog

I have been trying to establish a meadow on my front lawn, and one of the plants that appeared uninvited was Yorkshire fog, or at least that’s how I identified this plant

Just wondering if there is a danger of it becoming invasive and forcing out less robust plants? The meadow is still in the making, but I have a few yellow rattles and some other wild flowers, so I don’t want to endanger the process. Plus my front lawn is tiny, so not much space for big plants.

Just wondering if there is a danger of it becoming invasive and forcing out less robust plants? The meadow is still in the making, but I have a few yellow rattles and some other wild flowers, so I don’t want to endanger the process. Plus my front lawn is tiny, so not much space for big plants.
Any experience with this plant please?
Surrey
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I planted yellow rattle to control my “meadow” grass. It did a fantastic job, but instead I am now overrun by something resembling a very large yarrow. I don’t know what it is but it is unkillable.
If you live in Derbyshire, as I do.
If you live in Derbyshire, as I do.