Regarding that matter of His Excellency and how one might refer to a former Taoiseach.
I asked the Government Press Office
Former Taoisigh don’t have titles and are not referred to as “your excellency”. On printed matter and by way of introduction they are referred to as Former Taoiseach.
Grand so we are now clear on the matter. Over to you Bertie. Sorry I mean Former Taoiseach.