Experts have discovered tiles and pottery which are hundreds of years old while examining the grade-two listed facility in Ironmonger Row, Finsbury.
Peter Moore, project manager from Pre-Construct Ltd which is carrying out the work for Islington Council, said: “The biggest surprise has been the fact the archaeology has survived under the basement of the bath house which is amazing.
“The high value of the materials was also surprising. We were expecting run of the mill stuff but these items are very rare.”
Click here to read this article from the Islington Gazette