he died at the age of 61 in July 1834. Coleridge was once able to see the bright red door of the new church from his last home across the green, where he stayed with a doctor he hoped could cure him. This house is now owned by the model Kate Moss. He was then buried in the nearby chapel of Highgate school but in 1961 there was concern that Coleridge's vault had become derelict.
It doesn't say that.
Yes it does. There is a blue box after your excerpt which gives biographical and literary details, and on the other side of the box the article continues the thread that was being followed where your excerpt ends:
Following an international fundraising appeal the coffins were then moved to St Michael’s but as people died or moved away from the parish, the exact location of the coffins was forgotten, until a recent excavation revealed the entrance to the wine vault.