Strange clutch-slipping type behaviour

A little update, come back from Norway with no problem. 4500 miles trip, went as far as arctic circle and back, everything is fine with the clutch, even better now as there is no clutch slip at all now☺ I think that the little amount of oil on the friction plate must have been burnt out, as car was driven in the hard terrain (mountains) and the leak isn't big enough to "lubricate" it again☺

Could be! Fingers crossed!