The Defence Science and Technology Laboratory (DSTL) was created from the old DERA[?] in 2001 to take over those international collaboration, research and scientific areas that were deemed unsuitable for the too-be-privatised QinetiQ[?].
... the "rolling" point, but the gyro will also be accelerated to a smaller extent by the slipping friction.
The device is covered by US patents 3,726,146 (1973) and ...