The Icelandic Road and Coastal Administration has closed roads and banned hiking in a large area north of the Bardarbunga volcano.
The black hatched area on the map below shows the region that is out of bounds:
The organisation warns of a "danger of flooding in connection with a possible volcano eruption".
More top news
The former prime minister made the comments as he prepares to return to politics saying he wants to be "part of the debate" on Brexit.
The new measures would mirror childcare vouchers and see workers sacrifice some of their salary to benefit.
Google, Facebook and Twitter could face multi-million pound fines over their failure to remove illegal content, MPs say.