It would be interesting to learn just what are the initiators for an emergency deflation.
Initial reports suggested that it had collided with a tree.
As far as 'making safe' the helium - how do you get it back into the 'storage' tanks?
In the 1970s when the Goodyear airship Europa was built and based at Cardington:-
The parts for Europa were assembled in shed number 2, and the completed ship was first moved out of the shed on 8th March 1972 when the first flight was made.
Unfortunately, the successful first flight was marred shortly afterwards when on the 19th April, the ship tore away from it's mast, and the envelope deflated.
The ship and envelope came to rest in a tree in the grounds of a Cotton End house.