Thank you for the advice! It is much appreciated in anticipation of the first time we're getting a delivery tomorrow!
It's especially appreciated as, after 7 months in the UK, I finally feel like I know enough product names here that I could even attempt to order online!
The fee for delivery here ranges from £3-£5.50. This is less expensive than if we took the bus out there and then the cab upon our return with the bags. The order, however, is not quite as stocked up as I would be if I went out myself. I find myself paying £30 less for the total bill than I would if I went out there... but, it's worth a try. Especially if it saves time here. Also, I think I hurt my back with my last trip last week. So, if the delivery guy brings it right to the door--hurrah!
I will say, that overall, I found the online prices here in the UK to be about the same in the shop. This was different from trying to order online while living in Boston, MA, which had much more significant markup for online orders.
My fingers are crossed for a positive experience! Thanks UK-Yankee compatriots!