This is a really long shot but I am kicking myself that I didn't ask the woman where her bag was from. I saw her with it in a cafe in Bristol on Saturday but it was v. busy and I couldn't get around the tables.
It was a black ostrich tote, medium size with gold hardware. Top opening, no flap, no shoulder strap. No visible branding. Some kind of gold detailing along the top edge I think. It might have been high-end as both her and her friend were stroking it 
and having a conversation about it.
It was similar to this in style but looked much better quality and don't think it had that zip on it.
Can anyone help identify? I'm pretty sure that the one I linked to must be a copy of a designer bag.