So, info below is hopefully helpful and links below are for some of the frequented websites from the page. If you know of a website that would be good to add please let me know 
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Since it's so popular now there would just be too many links in the link post, and I'd go slightly unhinged attempting to get them all in, so I'm fine tuning and doing generic site links rather than specific product links (unless there's something so brilliant that consensus is to add it here). If there's a stupendous code that could do with adding on here let me know bold and big is really helpful for me . Hope you find it useful.
Predicted by fireflygirl the 25%off Sainsbury's dates:
(They were right on all but one last year
19 September 2017
24 October 2017
27 November 2017
From tattyboggle89:
18th October 2017
Looks like this will be the date for Sainsbury's big toy sale this year so save the date! Will update if I hear any different.
It's usually really good instore
And the 15th September 2017
This will be the date for Smyths 20% off all toys instore! (Usually is all toys other than video games etc)
Sockeatingmonster’s top tips about aliexpress:
I have used Aliexpress quite a bit over the last few years. My tips/observations are:
- Check reviews
- Be wary of plastic toys. There have been concerns about toxic plastics from China, and I have binned plastic figures for having very unpleasant smells. I no longer buy any 'low-end' plastic items and only ever from sellers with lots of positive reviews
- Aliexpress refund/complaints procedure is actually way more straightforward than eBay, and stacked in the buyer's favour
- Beware of mains operated electricals, many of which are supplied without fused plugs. Always message the seller first if in doubt, don't rely on the photos
- I don't trust dress up clothes to be flame retardant, although I don't believe this is UK law anyway?
- Clothes can come up very small. Quality can be variable (excellent to awful). Photos are often of similar items, so take them with a pinch of salt and check the reviews.
- Actually, all photos on Aliexpress should be taken with a pinch of salt. Again, check reviews (where buyers often post photos of the actual item received)
- I wouldn't trust toys to meet UK safety standards and wouldn't buy anything that could pose a risk (e.g. Paint might not be safe for children to gum, there could be sharp edges/choking hazards, etc)
- Lego alternatives don't tend to stick together as well as genuine Lego. Minifigures are still excellent value, but the odd one might benefit from a few drops of superglue.
10. Barbie and other doll clothes can be excellent value, but check reviews for fabric quality and finish
11. Stationery is generally excellent value, although paper quality can be lower than expected. Type 'kawaii' into stationery and be prepared to spend a fortune!
Bargain crazy website here an outlet for very and littlewoods
Joules eBay outlet here
Lisa Angel here
Studio have some well priced items but quality on everything isn't amazing here
Wonderbly (formally lost my name) here