Reopening the debate on Roman invasion of Ireland

[Marcus Aemilius Longinus]

Surveys are not expected to uncover the Roman’s distinctive linear roads or their large rectangular forts ...

Case closed?

Well not strictly true as there is a promontory earth works fort at a place called Drummanagh north of Dublin.
Excavations have taken place there which from what I have been told yielded some (yet unpublished) Roman finds. The fortifications ar Drumanagh consist of on earth wall and a double ditch in front of it. It can be seen clearly enough on the satelite imagery on google maps and is the grassy promontary just north of the town of Rush. Nearby Lambay Island also revealed some roman style burials.