This is what I have as a starting point from a book on special forces. "The gates of the Somnath temple, which had been carried away by Mohammed of Ghazni in 1024 AD and installed in the tomb of one Sultan Mohammed, were eventually recovered and returned to the temple by 1st Royal Jat Regiment during First Afghan War of 1842".
1st Royal Jat Regiment was part of the British contingent sent to fight during the first Afghan War in 1838. Archaeological Survey of India has them in possession and are kept at Agra Fort. 1st Jat Regiment was later affiliated to Mechanized Infantry Regiment in 1980 and became its second battalion.
I have contacted my friends at Jat Regimental Center to dig into their regimental history and provide me with details so that I can get an article done as well as get a board displayed at Somnath that would tell people about how our boys brought it back. Watch this space for more details.