Prisons plan could add 2,600 places in England and Wales amid overcrowding

Portable buildings and extension of electronic tagging expected to be part of package to be announced next week

Prisoners in England and Wales could be moved into portable buildings or released early as part of a huge extension of the electronic tagging scheme, as the justice secretary considers creative measures to solve the overcrowding crisis.

Alex Chalk KC is expected to reveal a package of measures on Monday that could add 2,600 prison places across the estate, the Guardian understands.