In the UK JAR-FCL 1.175 is quoted in Schedule 8 the Licenece privileges for JAA licences, but not for national licences.
Because it effectively prohibited night flying without an IR, para (b) was added at the behest of the UK, to allow pilots to fly at night without an IR. It appears your Article 19 has not included this para.
Its interesting that the British Military fly VFR at night but the civilians don't.
The UK CAA would not be concerned about you flying at night but the Irish CAA might. Of course if you fly below 3000 ft there are effectively no Instrument Flight Rules to comply with, its simply clear of cloud and in sight of the surface!