Folks here are often on the lookout for millbank bags. I notice that they are available from Kit Monster.
No connection to the seller, but I've had good service from them in the past.
Grade One http://www.kitmonster.co.uk/product_info.php/products_id/751
Surpluss http://www.kitmonster.co.uk/product_info.php/products_id/1572
No connection to the seller, but I've had good service from them in the past.
Grade One http://www.kitmonster.co.uk/product_info.php/products_id/751
Surpluss http://www.kitmonster.co.uk/product_info.php/products_id/1572