I think that if I were the new government of Barbados, I would try to keep the inbred Monarchy around such as to get the British to pay off the massive national debt. Then debt free, the new nation of Barbados could say good bye to the 100 year old Queen and say, thanks for your help, live long and prosper. And maybe set up some sort of trade deal with England to get lots of zero tariff goods flowing between the 2 nations. Hopefully, Barbados will not become a narcotics nation in order to balance the budget.
Watch for the Red Chinese go offer financial aid and trade in return for port privileges, possibly running some of them, or outright basing rights.
Barbados gets about 23 million pounds a year in foreign aid from EU members. That's on top of the millions that England and the US has given in aid and lost trade credit.
Chances are strong that, like the Marshalls, China will start cozying up to Barbados promising ‘infrastructure’ or ‘medical training’ or some such to ingratiate themselves that will put Barbados in a compromising position. And the freedom and security they enjoyed under the British Commonwealth long gone. But they asked for it, so Good luck to them.