:Drostre Bank
{{Short description|Protected area in Powys, Wales}}
{{Use dmy dates|date=April 2022}}
{{Infobox SSSI
|name= Drostre Bank
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|aos= Wales
|interest=
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|coordinates= {{coord|51.971944|-3.315|type:forest|display=title,inline}}
|enref=
|displaymap=Wales Powys}}
Drostre Bank is an area near Brecon, Powys, Wales, that consists largely of grass and woodland. The area was designated a Site of Special Scientific Interest in 2014. The remains of a small Iron Age hillfort are located on the site, near the village of Llanfilo.
Geography
Drostre Bank is an area measuring around {{convert|12.58|hectare}} in Brecknock.{{cite web |url=https://sac.jncc.gov.uk/site/UK0012878 |title=Drostre Bank |publisher=Joint Nature Conservation Committee |accessdate=4 March 2020}} The site has been grazed by local farmlife since the 1970s, although Natural Resources Wales estimate that it may have started several decades earlier.{{cite web |url=https://www.naturalresources.wales/media/671765/Drostre%20Bank%20SAC%20Plan%20Jan%2008%20_A_.pdf |title=Core Management Plan for Drostre Bank SAC |publisher=Natural Resources Wales |accessdate=4 March 2020 }} The woodland area is located between the villages of Llanfilo and Llechfaen.{{cite web |url=https://www.welshwildlife.org/nature-reserve/drostre-wood/ |title=Dristre Wood |publisher=The Wildlife Trust of South & West Wales |accessdate=4 March 2020}}
The Joint Nature Conservation Committee lists around 56% of the area as being made up of deciduous woodland. Around 37% is listed as humid grassland with the remaking area being made up of small percentages of dry grassland and water-based areas such as marshes, bogs and vegetation. In 2014, the site was listed as a Special Area of Conservation under the European Union's Habitats Directive. The primary reason for the area's listing was the areas containing molinia caerulea, known as purple-moor grass, that provides habitat for wildlife.{{cite web |url=https://jncc.gov.uk/jncc-assets/SAC-N2K/UK0012878.pdf |title=Drostre Bank Natural Data Form |publisher=Joint Nature Conservation Committee |accessdate=4 March 2020}} Drostre Bank had previously been listed as a Site of Community Importance in 1995.
A small, Iron Age-era hillfort is located on the site, measuring around {{convert|0.65|hectare|abbr=on}}. It is located around {{convert|2.5|km|abbr=on}} southwest of the village of Llanfilo. The hillfort is largely derelict with the western side having been overcome by vegetation. The eastern side of the fort maintains a small portion of the outer wall.{{cite book |url=https://books.google.com/books?id=ihOZpXRFZCQC&q=drostre+bank+brecknock&pg=PA99 |title=An Inventory of the Ancient Monuments in Brecknock (Brycheiniog): Hill-forts and Roman remains |publisher=Royal Commission on the Ancient and Historical Monuments in Wales |page=99 |year=1986 |isbn=0113000030}}{{Coflein|num=140471 |desc=Drostre Bank Hillfort |access-date=29 September 2021}}