Researchers test 'bomb-proof' train
Newcastle University engineers have been developing ways to make train carriages blast-resilient.
Methods include plastic-coated windows, energy-absorbing materials and tying down heavy objects and ceiling panels.
Lead researcher Conor O'Neill said the tests showed the development could significantly reduce the number of fatalities in the event of another terrorist attack such as that in London in 2005.
Video and commentary from Newcastle University