The Varsity Hotel & Spa, Cambridge

Website
Address: Thompson's Lane, Cambridge CB5 8AQ, United Kingdom
Hotel to Conference: 25 mins walking, 20 mins U bus, 15 mins cab
Rate: ~255£ (Double Room) - Limited availability!

Milan

Website:
Address: Gonville Pl, Cambridge CB1 1LY, United Kingdom
Hotel to Conference: 45 mins walking, 25 mins U bus, 15 mins cab
Rate: ~170£ (Classic Double)

Arundel House Hotel

Website
Address: Chesterton Road, Cambridge CB4 3AN, United Kingdom
Hotel to Conference: 30 mins walking, 20 mins Citi 4 bus, 12 mins cab
Rate: ~130£ (Superior Double)

More colleges here:

https://www.universityrooms.com/

More B&Bs here:

https://www.accommodation.cam.ac.uk/VisitingCambridge/Listings.aspx Rate: ~130£ (Standard Double)