It is true that planes flew before we were members of the EU but that will not work now as many more more complex agreements have been made. People also need to know that these agreements and other bi-lateral ones could not be agreed overnight.
I'd suggest that Leavers have a close read of this blog post from Richard North which deals with the subject of aviation:
An extract:-
At a meeting in Brussels on June 12 with representatives of the EU-27, with the UK not present, Filip Cornelis, aviation director of the Commission's transport department, is reported to have told them that, if the UK leaves without a full aviation agreement, all flights between Britain and the EU would cease.
But this, says Booker*, is only the start of it. He refers specifically to the Notice to Stakeholders issued by the commission in April which warns all concerned of the "legal repercussions" for aviation of the UK's decision to leave the EU to become a "third country".
Booker notes that this sets out, in just over two-and-a-half pages, how every single activity of our aviation sector, from the operation of airports to the manufacturing and maintaining of aircraft, is only legally authorised under a mighty thicket of EU law. And the moment we leave the EU all this will "cease to be valid".
Thus he says, with every justification, "without an incredibly complex operation to ensure that every tiniest detail of this legal framework is replaced, in ways not just acceptable to the EU but compliant with international law, much of British aviation will simply come to a halt". Even our right to fly in any international airspace is governed by a mass of international agreements to which we are only party as members of the EU.
www.eureferendum.com/blogview.aspx?blogno=86918
*The Booker referred to is a colleague of Dr North's who writes a column for (I think) the Sunday Telegraph
I'd remind people that Dr North has spent the last 40 or so years being deeply opposed to the EEC/EU, has studied its legal and regulatory framework in great depth and had worked out a detailed plan for a phased withdrawal from the EU with minimum disruption. It can be found on his website if anyone is interested, though it's of academic interest only as it's never likely to be implemented...
www.eureferendum.com/documents/flexcit.pdf
How to get help putting suitcase on the conveyor belt at airport check-in

