The UK Prime Minister has made a big pre-election promise - ahead of July's general election.

The Conservative party wants to bring back 12 months of national mandatory military service.

Eighteen year olds could choose between a fulltime military placement or one weekend a month of community service.

Rishi Sunak's party has not stated the planned punishment if the compulsory service is not completed.

UK Correspondent Gavin Grey told Mike Hosking it'll appeal to right wing voters.

He says it'll cost roughly five billion New Zealand dollars and Rishi Sunak says it'll foster national spirit.

LISTEN ABOVE