You will likely not be able to check in early so will likely need to spend a few hours in internationals check in which isn't that comfortable. I had the same thing few months ago, connecting from Goa to a BA flight to London. Got there 4 or 5h before, they said check in would open 3h before, it eventually did 2.5h before, even as status pax in Club no chance before that.
I'd probably take a hotel for a few hours if did it again.