Now identified as Field Horsetail

Now identified as Field Horsetail

Observation - Now identified as Field Horsetail - UK and Ireland. Description: I have no idea what this is. On its own among grasses, cuckoo pint, old stems of St Johns wort, etc.

I have no idea what this is. On its own among grasses, cuckoo pint, old stems of St Johns wort, etc. Thank you in advance if anyone can help with i.d.