I am planning to travel to India from the US via London. I am an H1 holder with a valid visa stamp.
Now instead of booking a Multicity ticket SFO->LON->BOM->SFO, I am planning to book 2 return flights: SFO<->LON and LON<->BOM, as this is much cheaper.
The only thing here is that I will need to make sure that I have enough time while coming back in London as I will need to check-out and check-in again.
Could someone please suggest if this is doable and any other complications that may arise due to my visa status? Would the US immigration be done at the London airport itself?