Laptop recommendations

chloe7800  The MSI is listed as out of stock at Currys but is still available from Argos:

https://www.argos.co.uk/product/3343173

Of the ones you listed, the Lenovo with 16 GB RAM is the best for overall use, but its graphics chip is a bit slower than other similar options.  So it's something of a trade-off.   If you want the best Sims 4 performance, the MSI is the better option.  But the MSI's RAM is soldered to the motherboard, meaning you couldn't add more later.

The other two are a little slower and I'd skip them entirely.

If this laptop is only or mainly for Sims 4, and you don't mind playing with nothing else running in the background, and you'll be in a position to replace it in, say, three years, the MSI would be the better option.  (It also has a nicer screen if that matters to you.)  If you want or need to multitask, or the laptop needs to last longer, I would strongly consider the Lenovo for its extra RAM.

The other option is to wait until Black Friday sales, to see if something with 16 GB memory and a faster graphics chip drops into your price range.  There's no guarantee, but it's a reasonable possibility, especially as new stock is coming in around that time and retailers want to clear out last year's still perfectly-usable models.