The East Blockhouse is the only such defensive structure to survive in Wales and is protected under UK law as a scheduled monument .
An archaeological survey of the blockhouse , funded by the Welsh heritage agency Cadw , took place in 2011 .
The East Blockhouse is the only such defensive structure to survive in Welsh and is protected under UK law as a scheduled monument .
An archaeological survey of the blockhouse , funded by the Welsh heritage agency Cadw , took place in 2011 .