Tita was very kind upon meeting us. After checking in, we were brought to a basement apartment that is attached to a larger basement storage/workshop. The bathroom was a combined shower/toilet at about 2.5’x3.5’ total. There was a strong damp odor and when we opened the private entrance we found what appeared to be black mold throughout the ceiling (as in the ceiling was mostly black). 2 of my friends are allergic to mold and we had been trying to figure out why they were getting so sick so quickly(within 30 min one had spiked a fever and the other immediately got a bad headache that went away when she left the apt). After another of my friends laid on the bed for a nap she awoke with bug bites on her legs. There were gnats flying in the room as well. In the 4 hours we were present there was lots of noise in the house above and in the adjacent work area/basement. The apartment is about a 45 min walk to London Bridge, but there is a bus stop directly outside. As soon as we were able we checked out and found a hotel room to stay in instead. When we checked out, the hosts were not present and did not contact us. (We have photos of everything)