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- The M1 southbound at junction 6a is closed following a crash this afternoon.
- Hertfordshire Constabulary says that five cars were involved in a crash.
- No one is reported to have been seriously injured.
- The crash has caused major delays, with long queues forming back to junction 8 at Hemel Hempstead.
- The A414 is also queuing from the M1 to the Park Street roundabout.
- Diversions are in place for motorists to follow the M25 clockwise to Junction 22, turn and return to Junction 21A to continue on the M1 Southbound.
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