So both your parents were indeed born with British citizenship - you will know this being so glued up on history. You were born in England as a British citizen. You went to a British school - despite previously saying you spent most of your childhood in Ireland. You went to a British university. Your parents lived in Britain for more than 20 years. You and your siblings have lived in abritain for most of your lives. You don’t come much more British. You are more British than Irish. If you want this collective British guilt then you are part of it.