This article is from the source 'bbc' and was first published or seen on . It will not be checked again for changes.
You can find the current article at its original source at http://news.bbc.co.uk/go/rss/-/1/hi/england/london/6492501.stm
The article has changed 3 times. There is an RSS feed of changes available.
| Version 0 | Version 1 |
|---|---|
| 'Poison gas' test on Underground | 'Poison gas' test on Underground |
| (about 4 hours later) | |
| Tests are being held to see how toxic gas would spread if it was used by terrorists on London's Tube. | |
| The trial is taking place at St John's Wood station on the Jubilee line, which will operate as normal. | |
| Harmless sulphur hexafluoride was released and then equipment checked as the gas drifted around the building. | Harmless sulphur hexafluoride was released and then equipment checked as the gas drifted around the building. |
| The one-day trial will be repeated next Sunday. The results will be analysed by scientists at a Ministry of Defence laboratory. | The one-day trial will be repeated next Sunday. The results will be analysed by scientists at a Ministry of Defence laboratory. |
| The release of sarin gas in the Tokyo subway system in 1995 killed 12 people and injured nearly 6,000. | The release of sarin gas in the Tokyo subway system in 1995 killed 12 people and injured nearly 6,000. |
| The St John's Wood trials were announced earlier this month by Transport Secretary Douglas Alexander who stressed the tests were not a reaction to any threat increase or a measure to enhance security at Tube stations. | The St John's Wood trials were announced earlier this month by Transport Secretary Douglas Alexander who stressed the tests were not a reaction to any threat increase or a measure to enhance security at Tube stations. |
| The experiment follows trials of passenger screening technology at Paddington station in west London in January last year. | |
| There were further trials at Canary Wharf and Greenford Tube stations. | There were further trials at Canary Wharf and Greenford Tube stations. |
| Trials also took place last August to test the practicalities of deploying portable vehicle access control barriers at major entry points at Waterloo and Victoria stations in London. | Trials also took place last August to test the practicalities of deploying portable vehicle access control barriers at major entry points at Waterloo and Victoria stations in London. |