I was passing through London for a few days with a bunch of life admin to do and Mary's place was perfect as a base for running around. It was cosy and super warm, and Mary is lovely. It was just a total nightmare trying to check-in which resulted in me wasting a day crisscrossing London for what turned out to be no reason, so I'd just suggest making sure you make a concrete plan in advance or ask for Mary's number to be sure you can get in touch.