Sanjay felt the typical middle class person would describe a man from Uttar Pradesh as 'UPwale' or from Bihar as 'Biharwale'. So Londonwale for Ramji from Bihar, who is transported to an alien land in London, would give a nice touch.
Sanjay thought it would have tremendous recall value and Maddy, himself half Bihari, loved it.
The duo decided not to reveal the new title till the movie was completed. And when they did, they got a tidal wave of approval instead of a storm of protest.