I'm a UK national with an Irish grandparent who was born in Ireland. To the best of my understanding, this means I can become an Irish citizen through the Foreign Births Register. The documents required include an "Original civil birth certificate (showing parent’s details)". Unfortunately, I don't know where my original birth certificate is. I can order a copy of a birth certificate from the UK government website.
My question is does this copy count as "Original" (i.e., can I use this to apply to the Irish Foreign Births Register)? If not, does this mean I'm ineligible to become an Irish citizen?