Well spotted, Heidi! If Ravenhead, Made in England, they could theoretically have been manufactured at any time up till 2001 or so, no? Interesting that the seller has 3 x 4 pieces for sale, presumably all packaged.
I remember that, back in the 60s, Woolworth used to sell all their glass and china as individual pieces, and I seem to recall reading that in the 50s Sherdley had some sort of exclusive deal with Woolies. Sorry, I can't remember where I read it.
Anne, I seem to have the same type of Nordic items as you - sundaes, cream jug, large jug, large bowls and a circular butter/cheese dish with a extended flat rim - or is that what you mean by a covered dish? I haven't seen a Nordic tumbler in over 30 years. I would have thought they'd be fairly commonplace. Hmmm... Perhaps there were fewer pieces made in that design than I thought. Know of any other pieces? Whether in Nordic or any other Sherdley design?