The next large CalMac ferry due to be overhauled at the Garvel yard arrived rather prematurely at Gourock this afternoon. ISLE OF ARRAN, which was due to leave the Islay service on Tuesday, was withdrawn from service yesterday morning following her having collided with the berth at Kennacraig, sustaining serious damage as a result. Her bow visor, which was closed, was holed on the starboard side, while her fore peak tank - situated below the visor - suffered from major deformation. Today she left Kennacraig and moved, unaided, round to the Clyde to await docking. A full investigation into the incident is likely to be held by the MAIB. When the collision took place, ISLE OF ARRAN was carrying 14 passengers, two commercial vehicles, and five cars.