Came here many times to explore when I used to live in Lincolnshire, it was alot more open up back then and you could explore all the buildings including the church. This was also the set for some very cheap budget horror film many years ago but the name escapes me. One visit I will never forget was when we had gone on a summer evening, walked around the grounds and buildings, some of them we couldn't get into anymore. From the top window of one of these buildings we saw the ghost of a nurse in the old fashioned clothing, creep yet fascinating all the same.
Now I live in Lancashire and don't know many places nor have the time sadly. Try and see if you can get into the old brewery near the train station, I remember the entrance to get in but I won't say it on here