Just picked these up in Asda, noticed they have the same deal online too.
Excellent quality, my existing small ones has taken some bumps with no chips or breakage and wash up sparkling.
"Kit out your kitchen in style with this Pyrex two piece roasting set. These stylish glass roasters come in two sizes, catering for any meal, big or small: 35 x 23 cm and 40 x 27 cm. These classic roasting dishes are dishwasher safe for your convenience and are highly resistant to shocks and scratches."