I was in Mercadona today so I bought 5 litres of their "fresh milk". The use by date on it was 14 March 2019. Funnily enough that is the date that Mercadona re-opens after it closes this coming Saturday (23 February) at 3pm.
I understand that the fresh bread section of the shop is being relocated. I do not know what other changes might take place. I guess we will have to wait and see.