Kensal Green was the first commercial London cemetery to be opened. This was in 1833 and thus was the first of the Magnificent Seven cemeteries. George Frederick Carden, the cemetery's designer, had visited Paris in 1821, and was so struck by the beauty and vastness of the cemetery of Père Lachaise that he decided to replicate it in London.
The Friends of Kensal Green Cemetery arrange regular tours - see
Link which include the catacombs - see
Link
This magnificent tomb is alongside the main path. According to the inscription on his monument, Major General The Hon. Sir William Casement K.C. was late of the Bengal Army and a member of the Supreme Council of India.