Suppose Alice lets a room to Bob, under a written contract that is incorrectly labelled as a lodger's agreement, however, Alice does not live in the property, thus automatically rendering Bob an assured shorthold tenant.
The initial fixed term was a month, after which it rolled into a statutory periodic AST.
2 weeks ago, Bob sent Alice a rather informal notice to quit by WhatsApp. He is now having difficulty finding alternative accommodation, and has asked Alice for permission to stay longer, which she has denied. Is Bob bound by his original informally served NTQ, or was it legally ineffective?