NO EASY WAY VIA LONDON

I plan to fly from Goa, India, to Stockholm in November, via London Gatwick. I have an Indian passport. Can I board the flight with my Schengen visa and change flights at Gatwick? — Upendra Ratwal

The short answer is no — you are likely to be turned away at check in at your departure airport. You will need to apply for a Direct Airside Transit visa, even if you do not intend to leave the airport or pass through UK immigration. See gov.uk for details.