My wife had an accident yesterday. Her 2011 Toyota Yaris struck a tree, flipped into the air and somersaulted across the road coming to a stop on top of a ditch. The car is a complete wreck, but miraculously she crawled out with only a few sore limbs: nothing broken.

The seatbelt seems to have saved her; however, on inspecting the vehicle afterwards, I noticed that the airbags failed to deploy and I was wondering just what force is needed to deploy them?

Surely there's a huge degree of responsibility resting on the manufacturers shoulders to ensure that these features "do exactly what they say on the tin". Should I contact a solicitor or car manufacturer?