My girlfriend and I had a nice 1 week visit to London. We were hoping to arrive around 10 - 11 p.m. but we ended up arriving at around 1:00 a.m. We were in contact with Nelly after we arrived in London although, it was hard to find working wifi areas at night. Regardless we were able to let her know we were running late and she was ok with it. Nelly gave us a quick tour and left us to it.
She gave us tips and we were extremely pleased with the locations, especially the public parks and areas near the AirBnB, located at Croydon, London.
The room was a bit chilly at night so bring some warm clothes if you're traveling during the fall/winter time.
We kept in contact via Whatsapp during our stay and Nelly was always available. Over all, it was a positive experience.