Cambridge is easily reached from London by train in under an hour.
However, if you are planning to stay in Cambridge the night before and/or after the meeting, accommodation can be booked through the Visit Cambridge website, which can be searched for wide range of bed and breakfasts, guest houses, hotels and self-catering accommodation.
The university Accommodation Service also has listings.
The Møller Centre offers accommodation. For more details visit: www.mollercentre.co.uk/accommodation/
Churchill college also offers accomodation. For more details visit:
www.chu.cam.ac.uk/conferences/facilities/accommodation/