Originally Posted by
polax52
Overflight is not effected in any way. Totally different convention from the EU open skies. I think -Chicago convention from many years prior to any EU agreement.
The International Air Services Transit Agreement done at Chicago 7 December 1944. This agreement effectively grants unlimited 1st freedom (overflight) and 2nd freedom (tech stop) rights by a signatory to all other signatories. The U.K. and most other EU member States are signatories.
If one party renounces it (a years notice necessary) they remove overflight/transit rights for themselves as well as for other signatories over their territory. Canada renounced their participation in the ‘80s requiring them to propose revisions to all their existing Air Services agreements to include 1st/2nd freedom rights. That took quite a few years as I recall.