I seem to remember an old MOD film they showed us in Germany using possibly a Meatbox..... The Meatbox was duly pushed inside along with a load of sheep, the doors closed and the equivalent of a thousand pounder was detonated outside the HAS to show the effect.
The narrator carries on after extolling the virtues of this hardened shelter by pointing out that although the aircraft has sustained some damage it will be flying again in a short period of time................. Our eyes were however drawn to all the dead sheep that suffered from the blast wave as we were expected to live in the said HAS with OUR aircraft............
So much for giving everyone confidence.