Another mystery on the beach

The blue bags found on the beach.

Following the solution of the mystery of the yellow lobster tags washing up on the north Northumberland coast.

Here’s another.

Does anyone know what these blue, almost square bags with black interiors are?

Volunteers planted 4,000 bulbs on the grass banks outside Barter Books in Alnwick.

Alnwick in Bloom volunteers dig in for a colourful spring display