Problem: Antigua & Barbuda and Barbados, both don’t have embassies or consulates in India.
So I could not find a legal way to apply for a visa to these countries for my fiancee, who is currently in India, without getting her to fly to London.
The High Commissions of Antigua & Barbuda and Barbados both recommended applying for a visa in London. But Indian passport authorities clearly warned against sending a passport abroad with someone else. The penalty for such an action could be Jail for the person carrying the passport, and a 10 year ban for getting a new passport (I don’t have a link/reference to support this. But this is the response my fiancee got from a senior passport officer).
Result: No trip to Antigua & Barbuda or Barbados this winter!