Shadwell and Brick Lane fabric shops

There’s a mini chain of fabric shops with one in Walthamstow and one in Shadwell and a few others somewhere. I’ve gotten over the shock of £1 a metre fabric so it wasn’t a surprise that Shadwell had more of the same. I still don’t know the difference between one type of cloth and the other and what is good and what’s cheap so I’m holding off buying too much for the minute. Brick Lane also has a few shops with the same story. Some of them weren't open on Sunday when I went around to take pics