This morning, questions were invited by the BBC Radio 4 Today programme, to be addressed in a future programme.  I supplied the following, and may well use them for similar purposes elsewhere.
Question 1
Everybody is asking what would happen after we leave the 
EU, but the period of years between a vote to Leave and the agreement of
 a new relationship would have economic impact.  This is probably more 
predictable, being closer in time and mostly a matter of unncertainty. 
 What projections can you make about what we might call the Brinterim?
(Michael Gove has said he doesn't see us leaving the EU "this parliament" and the 
House Of Lords report on the subject agrees it would be a long and complicated process.)
Question 2
Is
 it not true that, as a matter of international law, the UK could not 
make trade agreements with any other country until we finalised an 
agreement with the EU and were no longer a member?  Wouldn't some 
prospective partners in any case want to see what arrangements we made 
with the EU, to understand what kind of deal they could make with us 
themselves?
Question 3
Is it not true that, as a 
matter of international law, any unilateral attempt to restrict 
immigration from the EU (and other unilateral measures) could be 
declared unacceptable?  It would also change the stance taken by EU 
negotiators.