What laptop to buy

zebrastacker2004​  Feel free to link the laptop you found for £329, as a comparison.

As for what I would suggest, these two are the best I'm seeing for under £330; they're £270 and £300, respectively.  They have the same graphics chip, so performance in Sims 4 should be roughly the same: you should be able to run the game on medium graphics settings with all packs installed.  The second one is a bit newer, has twice the storage, and has a much nicer screen, so I would suggest that rather than the first if the slightly higher price isn't a problem.

https://www.hp.com/gb-en/shop/product.aspx?id=A44R9EA&opt=ABU&sel=NTB
https://www.currys.co.uk/products/asus-vivobook-15-oled-x1505va-15.6-laptop-intel-core-i3-512-gb-ssd-silver-10280524.html

If you have more questions, about these or in general, feel free to ask.