Searching for a black dress - long, cheap, not revealing

[ObstreperousCushion]

Does anyone know where to look for an ankle length black dress?

Requirements are size 6/8, ankle length, crew or other high neck, short or 3/4 sleeves, no cut outs or anything inappropriate for a young teen.

Ideally it would have a waist tie, be polyester or something else that doesn’t crumple, and less than £50.

I'd start at Next.
https://www.next.co.uk/style/su061295/m37470#M37470
https://www.next.co.uk/style/su597876/f03399#f03399
https://www.next.co.uk/style/su718517/h24215#h24215
Is it for an event/performance with a specific dress code?

George at Asda have lots of black maxi dresses, sleeveless through to full sleeve. Just one example here for £25. You can order them to collect at store for free and return there if not right.

direct.asda.com/george/women/dresses/black-long-sleeve-tie-neck-midi-dress/GEM1267714,default,pd.html?cgid=D1M1G20C1

I had a look at Next, but couldn’t see anything that meets the dress code (which is quite strict - no cut outs, no bare shoulders, no slits in dresses, must be ankle length). V neck doesn’t work, as they’re all too revealing.

I’ll have a look at Asda, but I’m not sure they do a 6, and a big 8 will be too big I think.

That second Next one looks possible, thanks! The others aren’t long enough, unfortunately. It needs to be ankle length, not midi, and she’s fairly tall.

could always put a black vest underneath if v neck too low

https://www.boohoo.com/product/boohoo-petite-floral-jaquard-maxi-dress_gzz80344?colour=black

From Very