Musty, the exam venue in Bedfordshire has been moved from it's original location at Silsoe, and over to Shuttleworth. Shuttleworth is not far from Silsoe, right off the A1.
A map to the site is
HERE to download as a PDF
It's on the same site as Old Warden.
There should be plenty of accomodation available nearby.
Good luck with the exams!