I read something this week that said hd players and videos are separated into 3 zones.
North and South America are one, Europe and Africa are one and China, India and Asia are another. It was something like that.
It is done to make the dvd's compatible with each region's system whether it is PAL or NTSC or something else.
So maybe it means like a blu ray player won't play it but a ps 3 will.
If you are going to buy an Indian dvd I would make sure it is sold in the UK instead of getting one directly from India.
Try Amazon, Blockbuster Netflix .