In 2017 Lilly started an English and Drama degree course at Borchester University. Her mother, Elizabeth, purchased a house close to the university campus for Lilly to live in. The main house comprised two ensuite bedrooms, a living room, and a kitchen. There was also a summerhouse located in the back garden with its own kitchen and shower. Elizabeth told Lilly that she would need to find somebody to share the house. Lilly persuaded her boyfriend, Russ, to move in to the main house with her. They signed identical documents with Elizabeth, although Russ signed his a day later than Lilly because he was at a job interview. Elizabeth thought it was simpler to use licences rather than leases; and the agreements were labelled accordingly. They provided that Lilly and Russ were to pay 300 per week for four years. The agreements also provided that Elizabeth could stay over whenever she wanted. Lilly and Russ moved into the main house the week before term started, and shared one of the bedrooms. Elizabeth held onto a key. A few times Elizabeth let herself into the main house after neighbours contacted her to say that the burglar alarm had been ringing for some hours. Elizabeth was so upset by the state of the kitchen that she started to clean it once a month. Lilly and Russ were always out at the time and did not notice that it had been cleaned. In 2018 Elizabeth's son, Freddie, was released from prison. He decided he wanted to save up enough money to allow him to emigrate to America in a few years time. Elizabeth therefore agreed to grant him a lease of the summerhouse for three years or until such time as he emigrated. Freddie moved in and started to pay the agreed rent. Elizabeth has never got round to granting Freddie a formal lease. Elizabeth now seeks your advice about the legal status of the arrangements that: (a) Lilly and Russ have to occupy the main house; and (b) Freddie has to live in the summerhouse. Advise Elizabeth.