I have received my UK indefinite leave to remain using spouse of Irish citizen working in London, prior to Brexit. But now when planning short term travel to Ireland with my Irish spouse I can’t tell if my residence card is issued by non EEA, and if hence I need a visa, even though travelling together with marriage certificate.
I can’t tell if my residence card is issued by non EEA
It is. The UK is no longer in the EEA. Furthermore, the card is not a "residence card of a family member of a union citizen" in the meaning of the free movement directive. I'm fairly sure that you need a visa.
The Irish implementation of the free movement directive seems to be incorrect in a couple of respects. In particular, there are some situations that should fall under free movement law that are not acknowledged by the government:
- They do not seem to acknowledge that the free movement directive also applies to short-term travel.
- They do not seem to acknowledge that the free movement directive applies to Irish citizens who return to Ireland after exercising free movement rights in another EU country.
There might be a legal argument in there that would allow you to invoke free movement rights, but it depends on these two conditions that Ireland seems not to acknowledge, and then on top of that you'd have to establish that having used free movement rights to settle in the UK continues to trigger free movement rights on return to the home country. This would most likely be a long and costly legal battle, and if you succeeded it wouldn't relieve you of the visa obligation, only of the need to pay for the visa. It's far simpler just to get a visa.