What’s This Weed Called?

Question

These have appeared in my back lawn two days after mowing, it’s the first cut as I’ve only just moved into the property and it’s been vacant for a while

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Answer 1

I suspect it is horsetail. Here is more:

https://www.rhs.org.uk/advice/profile?PID=257

https://www.gardeningknowhow.com/edible/herbs/horsetail/horsetail-weed-control.htm