Yep, as expected, no luck. No baking powder, either. Sorry, Margo.
I took a risk and went to Waitrose on Byres Road before it opened and was one of the first through the door. (Not much of a crowd waiting, just a few people.) It's heavily picked over, but plenty of milk, bread, etc. on the shelves. Cereal, too. Plenty of fresh veg. They had frozen quiches, plenty of teas and coffees - basically pretty much a normal grocery store, with some noticeable empty shelves. Their "free from" section was very well-stocked, just as prior to "all this." There is a two-item limit to everything in the store.
People shopping looked really freaked out though. They were moving much more quickly than usual.
And unfortunately, they are no longer wiping down the self-checkout after someone uses it and there are no wipes for you to wipe your trolley handle with. I had taken my own woven grocery basket so aside from picking an item off the shelf and putting it in the bag, and when I had to set it on the tillside (where a young child had been allowed to climb and play before I got to the till!!!!) it was relatively sanitary. I used my card to touch everything that needed touching. And then when I got home I wiped everything down when I got it out of my basket, wiped my basket down, wiped my card down, wiped the wipes bag down, wiped the door handles, wiped my keys, then wiped me down. If that doesn't do it, it's fate.

The baking aisle was decimated, though. No flour, no baking powder, no yeast. I just bought a large loaf of Warburtons seeded instead. The guy stocking said they got fresh bread in every night, and they had yeast due in. It should have arrived already but had not, so when they got it later today they'd put it on the shelves right away. So I won't have a shot at it as I'm not going back out again, except for an exercise walk, until we run out of something we can't do without. I still have a little yeast left here and am going to start a yeast mother that hopefully I'll be able to keep alive and it'll give us all we need. If not, I can make tortillas.
It's an absolutely beautiful day out, otherwise. Not too cold, no biting east wind, blue skies, puffy white clouds, daffodils everywhere and the trees starting to bud out.

The air is really clean today, too.