The new Test Centre opens up on Jan 27th 2015, if you are booking a test for on or After this date choose Leighton Buzzard (Stanbridge Rd).
The old one closes on Jan 21st, if you are booking a test for on or Before this date choose Leighton Buzzard.
They are to hold an open day so you can look round the new centre, date and times to be arranged. Will keep you informed.
Patrick.