Twenty-nine people were arrested and ten vehicles seized during an operation to target transport-related crimes in the west of Barnet.

The collaboration between the borough's police and Safer Transport Team deployed 230 officers in an attempt to stop people misusing the area's travel networks.

Checks and searches were carried out on major roads, at stations and on the bus networks around the A5 through Edgware, Burnt Oak and Colindale from June 1 to 7.

Knife arches were put in place at four Northern Line Tube stations as part of the clampdown, codenamed Operation Bigbury.

The police dogs unit also carried out drugs searches, while automated number plate readers identified stolen and uninsured vehicles.

As a result of the operation, more than 270 buses were checked, with about 100 passengers asked to get off after acting violently or failing to present a valid ticket.

Stop and searches were carried out on 219 people and three motorists were found to be driving without valid insurance.

The operation, which lasts for another three weeks, has so far recovered £3,100 in fines for various offences.

Dave Lobb, acting Inspector for Barnet Police, said: "We want those who use the system lawfully to feel protected.

"The operation over the last week serves to give notice to those who wish to abuse the transport system that it will not be tolerated. If you travel without the correct authority you can expect to be arrested."

Police Sergeant Lee Cannon of Barnet Safer Transport Team added: "We have found that those involved in minor disorder and low-level criminality are often involved in other more serious matters. Using another's Oyster card may not seem a big deal, but when it leads to the recovery of drugs or gaining valuable intelligence, it makes this all worthwhile.

"Our message is simple really: if you come into this borough, our home, and put your feet up on our kitchen table, then expect to be challenged."