Small green deco-ish English jug vase

Height 5 ¾”/14.5cm, just over 2 ½” wide at rim, just over 2 ¼” at base.  Light blue-green with light brown mottling, semi-matt glaze, inside & out.  Feels smooth, of fairly heavy clay, and pleasingly well made. Thickness about 3/16”/.5cm (‘Handle’ & ‘ ‘spout’ hollow).  Crazing nearly all over (subtle on the outside, more obviously (because stained?) towards bottom of inside.
Unglazed rim of base shows creamy-white clay, & signs of wear.
3 marks (all under glaze); ‘Made in England’ stamped in dark blue, ‘120/3’ embossed (by hand I think), and a brushed-on dark blue mark (2 lines and a solid triangle).
Mass produced, perhaps?  I don’t suppose it’s worth much, but any ideas re makers/dates?

It’s my.latest charity shop buy (usual habit - buy something I like, and try to find out about it later).
The only image I could find on the web that’s anywhere near the colouring, looks an exact match (& sounds it from the description); but that one’s unidentified too!  (A vase of different shape, described as 1930s, here); http://www.vanishederas.com/ekmps/shops/vanishederas/images/zz-art-deco-vintage-pottery-jug-vase-in-blue-green-glaze-with-brown-mottling-c.1930s-sold-6467-p[ekm]320x488[ekm].jpg

I'm thinking SylvaC but others will know better than me.

Beswick/Wade heath/Empire/Price, could be any really.

Thanks both!
I tried a search including 'Sylvac' - the images looked quite promising, but I couldn't find the same colouring, or unfussy kind of shape.
Curiously, there was 1 exception; the same image I linked to in the OP. They both go to the same web page where I can't find any maker's name (so how did Google know to include it not far down the results when the search included Sylvac?)

I'll try denbydump's suggestions next, and if it's not one of those makers, I expect 'related images' will help with homing in.

Try Shorter and Sons

That base and glaze rang a bell for me. A quick google image search later (shorter and Sons) and a 99% glaze match can be found on a popular internet auction site for a very similar deco jug (three rows down in the centre of my search lol).

Thanks Mordeep!

I've just searched on Shorter & Sons.  Though I haven't found my jug yet, the search did find a base with markings remarkably similar.  It looked like the base of that closest match via my link in the OP, and it was.  It led to the same website, with both images among several of the same vase (I hadn't realised the 1st time that a vertical row of dots on the left linked to other views of it!).
This is the base of it.  I'd guess the 2 vases are from the same maker - would you agree?
As to what maker: well so far Google's thought it's Sylvac, and Shorter & Son.  But at least there'd be another shape to search for!

(Sorry - I'll have to try with the photo again tomorrow - for some reason 'Send all' isn't doing anything for me tonight).

Wade or Flaxman Wade Heath is still my favourite.
I valued a box-full of these a few weeks ago for a charity shop.

Thanks denbydump! Had a quick search on those; haven't yet found my jug shape there yet, but some of them could be the same shape as that other jug, so things might be starting to add up.

This is the base of the aforementioned jug with identical-looking glaze

Personally I would suggest getting a glaze match is a better idea of origin than an exact shape match. Ceramic companies had a habit of going bust or changing hands a lot last century (and the one before). The moulds used to produce items like your jug would then end up with new makers, new companies. It was very common.

Glazes on the other hand are a chemical recipe that unless you have and unless you are firing at the same temperature you can't replicate. So in the absence of marks that says made by so and so. I use the glaze to identify first rather than a shape. It's why I think it's shorter and sons. But of course could be loads of the previous mentioned makers who made in bulk for the English retailers (a common reason for no makers mark was a retailers request to stop buyers finding the same thing elsewhere, the number is there for the retailers stock code).

That's a very good tip Mordeep

Thank you, Moordeep - that's very useful to keep in mind!

I was forgetting how common pottery takeovers were/are.  And I have 1 or 2 pieces with retailers' marks, that I've failed to find the makers of (e.g. an early 20th century 0xford Street restaurant).
Maybe I'll have a quick try re old catalogues, adverts etc.  Just enjoying the designs is the main thing for me, but research can lead to finding more examples!.

At risk of getting all anorak, identification isn't just complicated by takeovers. In many cases where a factory could produce enough pottery to meet demand, they bought in blanks from other companies and then decorated them. It's documented that in the 19th century Pratt did this and it's almost inevitable that other Staffordshire factories did too. I'm sure anyone who's handled lots of pottery will have seen different (and unrelated) printed and impressed marks on a single item, right up to the 1950s.

The glaze identification is definitely a route to pursue but I suspect that you may never identify it definitively as there were so many minor makers as well that haven't even been considered. Good luck anyway!

Thanks for that, Essenjay. (It would only be anorakish to to people who weren't interested in the subject!).
If I can't track down the maker it won't bother me (and I will have enjoyed the learning, and the detective work (such as it is).