Airport-style security scanners designed to stop terrorists will not be installed at minor stations in Sussex.

The Department for Transport has indicated that Brighton and Gatwick railway stations could be in line to get the scanners which alert police officers to anyone carrying a weapon.

But the department said scanners will not be installed at smaller stations.

A spokesman said it did not intend to turn the railways into a "closed network" for customers.

He said: "It would not be like airports where you can only go 'airside' once you've been through the scanners.

"We are not planning to only let people onto the railway network once they've passed through the machines."

The scanners, which are similar to those in use at all major British airports, are currently on trial at underground and mainline stations in London and, if successful, could come to Brighton and Gatwick.

The trials are likely to be finished by July and a decision will then be made if they are to be used in other stations.

Brighton's Transport Police chief, Inspector Gary Ansell, said he would welcome any measure which protects the public. He said: "Brighton would be an ideal location for them and I would say Gatwick would be another likely and suitable location."

But the Department of Transport's intention to only have the scanners at Brighton and Gatwick has drawn criticism from commuters who are likely to bear the brunt of any delays caused by the machines.

David Hide, 36, from commuter group Travelwatch said: "I think you've got to have an all or nothing approach with these machines.

"I applaud the intention to stop anyone dangerous getting on at Brighton or Gatwick, but what's the point when a terrorist with any sense would walk one mile up the line to beat the system?"