What’s wrong with this statement?

UK seals its border and requires negative COVID-19 tests for arrivals in a bid to keep out ‘vaccine-busting’ variants. (Businessinsider)

From Monday 04h GMT giving the virus variants 72 hours to be walked in unchecked.

To seal SHOULD MEAN no one in or out.
No flights, trains, ferries, Zip, Nada, Nothing.

Only that’s not what will happen.
Everything will run as usual and all you need is a negative test to grant you access.

And yet again, it’s money before lives.
Ain’t that right Johnson!

More than lives!