You can book a room directly at the Canterbury Cathedral Lodge (symposium location for July 31 - August 02) for 100-132 pounds per night. Make your booking via e-mail: firstname.lastname@example.org, referring to the ISACC2019.
Cheaper single rooms (47 Pounds per night) are available on the campus of the University of Kent (symposium location on August 03). You can book a room directly using the link http://www.kent.ac.uk/holidays and the promotion code “ISACC19”
The rooms will be reserved for conference participants until June 01, 2019.
Befitting its role as a pilgrimage centre the city of Canterbury has a wide range of Bed and Breakfasts.