As above - from Trongate, Glasgow not long ago. At the bathroom section. Sauchiehall Street had these nearly a fortnight ago - not sure if still in stock.
This one is 10" x 7.5" x 4" (L x W x H).
There are "shallower" baskets in packs of 2 - see pic in Post #8 (didn't purchase/measure those) in the same style but went for the bigger option.
Pictures from different angles:
Underside (took a better picture as the first one had the flash on):
*Seems to be the "Poundland phantom brand" Home, etc.*