In 1981 Nilsen’s landlord at Melrose Avenue asked him to leave the home so he could renovate it. Nilsen was resistant at first but accepted a £1,000 offer from his landlord.
After leaving his home he moved into a flat at 23D Cranley Gardens, having burned the bodies of the last five victims at Melrose Avenue on a bonfire.
At Cranley Gardens Nilsen had no access to an outside area, and he was not able to store bodies under the floorboards in the attic flat.
Instead the bodies were either stored in cupboards, or body parts were flushed down the toilet. In February 1983, Nilsen himself wrote a letter to estate agents complaining the drains were blocked.
Once the drains had been cleared, human remains were found and this led to Nilsen’s arrest.
source: express.co.uk