The job was done as part of an otherwise very good renovation job. ....with hindsight, I think the work on the stove installation was due to lack of experience in that area... the flue gatherer was too low for the height of the stove which would otherwise have been located too far forward on to the floor... a steel plate was inserted in place of the flue gatherer, with a hole cut for the stove pipe to go through. I think the stove, steel plate and pipe will have to be removed and then the clay pots taken out that way..... then a liner inserted . As I said, it's single story and not a very long chimney...... wont be doing anything till after the winter as the system will have to be drained down..... wont be using the stove in the meantime