Travelling to Dublin via London

I am travelling to UK from India on a Business Visa. But have a meeting in Dublin the immediate next day.
I know my BV allows me to travel to Dublin.
My question : My port of entry has to be London. So do i have to stay overnight in London and travel to Dublin the next day ? or can i land in London and take a next available flight to Dublin the same day ? Will I go through border control and get stamped in london between the 2 flights on the same day? If yes then am good.
Best Answer
If you are going to Dublin via Heathrow, you will pass through UK Immigration control at Heathrow. You will enter the UK and then continue onto Dublin. Your documents will be inspected again in Dublin.
This is because of the UK's slightly strange travel/passport arrangement with Ireland.
There's no need to stay the night in the UK (unless your visa says so).
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Slow travel diary | London to Dublin (by train + ferry)
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