"If (traffic rights) are not negotiated because it is a hard Brexit it will be a disaster for the UK-based carriers because they will not be allowed to land in Europe, which is a small problem," Alexandre de Juniac told reporters in Geneva on Tuesday, although said he didn't think it would come to that.

De Juniac also repeated that airlines needed clarity on future flying rights by October next year at the latest.

(Reporting by Victoria Bryan, editing by Alistair Smout)