Will i need the counterpart with my provisional license to enter ireland by ferry?
If you’re asking if you can enter the Republic of Ireland with a UK provisional license, the answer is: legally your UK or NI provisional license is just valid in UK/NI. If you’re asking if you can enter Northern Ireland with a provisional license, I believe there are no problems, as long as you abide by the provisional license rules, ie. having someone fully licensed with you.
Provisional licences are only valid in the jurisdiction they are issued so if you are from the UK and are entering NI then your provisional license is valid once accompanied by a fully licensed driver. If you intend driving on a UK provisional license in the Republic then it is considered invalid – ie: driving without a license, and if stopped by the Gardai you will be charged with driving without a license and face a large fine and probably court with the probability of a custodial sentence, I wouldn’t try it as at this time of year the Gardai are demons for stopping motorists. Oh, and on entering the Republic it is always advisable to have a photo id – not everyone is checked but you could be ! and without id you would probably be refused entry without one.