Crewe Indoor Market is open every dayfrom Monday to Saturday but Friday is one of the three days when the outdoor section is also open.
It might be worth hoping on a bus to Nantwich. Service 84 leaves from Stand 12 of Crewe Bus Station every 15 minutes (at 00, 15, 30 and 45 minutes past each hour). The journey time is 20 minutes. There you'll find the museum open:
http://freespace.virg...wich.museum/index.htm