General   (General discussion, talk about anything.)

You don't need a passport.

"Ireland, along with the UK, is a member of the Common Travel Area. British nationals travelling from the UK don’t need a passport to visit Ireland. However, Irish immigration officers will check the ID of all passengers arriving by air from the UK and may ask for proof of nationality, particularly if you were born outside the UK. You are therefore advised to take your British passport with you"

LINK