Will Gibraltar survive Brexit?

Concern about their survival as a British Overseas Territory is growing - Nearly 99% of voters chose to remain under sole UK sovereignty in the 2002 referendum and 96% voted for the UK to remain in the EU in the recent referendum.

 

Nearly half its workforce cross the border from Spain each day - the majority of their trade depends on the freedom of the single market - Spain put forward a proposal of joint sovereignty following the Brexit decision, (flatly rejected by Gibraltar).

 

If Spain closes the border then it looks like many of the British young adults living there will leave.

 

What concessions do you think the UK will have to make to ensure the survival of the Rock.