Julie - I can understand the confusion as to date of the op's Registration and your vase - in fact I think the date is shown only once, and that's as part of the caption to my pix from Kew, so don't think you're to blame for missing that. I like your vase, but then I'm a big fan of blue and white. Difficult to be specific perhaps as to whether the guy on your vase was intended to be Charles I - always possible the image is simply a stylized pic. of Dutch art/Cavaliers/C17 costume, and as for the theme of the engraving on the op's tumbler, my opinion is that as a subject matter it seems to have been used very rarely in the U.K. around that time ......... I'm not aware of other pieces showing reference to this subject.
It's a shame Nigel that the glass in your link is in Pittsburgh - and I believe there others very similar in the Museum Bellerive, Zurich - but that's glass for you............ always somewhere other than where you'd like it to be.
I think if we started to debate the difference between aesthetic and A. & C. we'd be here all night.

But ever one to rise to the occasion, here is my take on recognized art movements from second half C19:-
Somewhere around 1860, Morris seems to have been extolling the virtues of C17 Venetian fine glass but already senses that the stuff is too thin and impractical and suggested it should be made thicker and less dainty, but must be "done by hand, and not by machine" - so this is possibly what drives him to ask Webb to create those 1860 designs for the Red House that you mention, although they in turn appear to be equally thin. Webb made a large service of pieces for personal use at the Red House, the style of which was described as -" 'medieval' in spirit, and somewhat reminiscent of German drinking glasses of the C16" - so here we see glasses designed by Webb - not Morris - although coincidentally they reflect what was to become Morris' personal signature theme of designs of pre-industrial manufacture - "have nothing in your house that you do not know to be useful, or believe to be beautiful etc. etc......"
Despite the fact that the date of 1860 is relevant here - relevant because various sources quote this date as the beginnings of the 'aesthetic movement' - neither these Venetian or medieval glasses owe anything to the 'aesthetic' movement - which (not my interpretation) is described as 'decoration with a strong Japanese influence' (think Whistler), and I see nothing remotely Japanese in any of the Venetian or medieval designs from Powell or Webb around that date. The aesthetic movement seems to have been fairly short-lived - fading away somewhere around 1880.
In fact I'd go as far as to say that my opinion is that the features that go to make up what is described as 'aesthetic' style, do not in the main lend themselves to glass ..........aside from pressed glass, styles from that period are either Venetian in appearance (see a lot of the early Powell designs), or a limited amount of medieval patterns as designed by Webb for Morris c. 1860. But like so many cliché words, 'aesthetic' has probably been over-done and mis-applied frequently, although it does look to have much bona fide use in other art forms - possibly ceramics mostly.
However, it does lead on to the next big artistic fashion, which was art nouveau - and this continued into the C20 with something of a break before art deco kicks in - both nouveau and deco were artistic shapes/styles that lent themselves far more to being expressed in glass than did the aesthetic or A. & C. movements - I don't include Venetian as a movement.
In the U.K. the introduction of the A. & C. style is attributed to Morris, with his misguided idea that people wanted a flavour of knights on horseback and maidens with tall pointy hats with a little silk flowing from the top, and then they'd be happy all day long toiling at their hand-crafted labours and go home in the evening and read 'News From Nowhere', poetry and dream of John Ball....... how wrong can you be!
Don't know that it's easy to put a date on the beginnings of A. & C., but it seems to have been very apparent in furniture around the early 1880s, but again glass items difficult to pinpoint. The criteria for the style of this fashion might be simplicity, functional design and robustness - so do the designs of Dresser qualify, and how about the 'leather bottle' flasks or 'Clutha' pieces? Gives you an idea of how some of these movements didn't lend themselves to glass when you look for example at the paucity of material shown in CH books, but as I say masses of examples in furniture, ceramics etc.
I don't think the Glasgow School was a movement that influenced glass fashion - painting, silverwork and furniture but not glass.
Nigel - hope this might help
