Active_comparator: Experimental: DCCV + PVI

An implantable loop recorder will be inserted in the pre pectoral area with local anaesthetic at least one week before the randomisation.~Two femoral sheaths will be inserted at the groin area in all patients on the day of the procedure prior randomisation. This will be utilised as the access route for cardiac catheter insertion for ablation and for phrenic nerve pacing during the procedure.~DC cardioversion (DCCV) plus Pulmonary Vein Isolation - At the end of pulmonary vein isolation, DCCV is performed (if the patient is still in AF).

Sham_comparator: DC cardioversion (DCCV) + Sham procedure

An implantable loop recorder will be inserted in the pre-pectoral area with local anaesthetic at least one week before the randomisation.~Two femoral sheaths will be inserted at the groin area in all patients on the day of the procedure prior randomisation. This will be utilised as the access route for cardiac catheter insertion for intermittent phrenic nerve pacing during the procedure.~DC Cardioversion and Sham procedure will be performed after randomisation. Intermittent phrenic nerve pacing will be employed for the sham group through the femoral venous sheath using a quadripolar catheter.