@emilygrce Among those three, I'd cross off the first: its graphics chip is slower than the ones in the other two, and you could do a lot better for the price. The only real advantage of the third one over the second is its larger hard drive, atlhough again, you could do better for £600.
These laptops are all in a lower class than the ones I listed in terms of performance, capable of running Sims 4 on medium graphics settings, or maybe medium-high if you only have a few expansion packs. (Game and stuff packs don't have nearly as much of an effect.) Gaming-level graphics cards don't come in 14" laptops, at least not until you get into a higher price range.
If you want other options, I found a few. This Dell has the same larger hard drive as the third laptop you found, and otherwise the same specs as the second one, and is £550:
https://www.dell.com/en-uk/shop/laptops-notebooks-and-2-in-1-laptops/inspiron-14-5000/spd/inspiron-14-5485-laptop/cn58501
You'd want to upgrade at least the processor in this HP, putting the cost at £500, but you'd also have more flexibility in the other specs.
https://store.hp.com/us/en/pdp/hp-laptop-14t-7ax33av-1
The same goes for this Lenovo: you'd want to upgrade at least the processor, but you'd have flexibility in choosing more upgrades if you wanted.
https://www.lenovo.com/gb/en/laptops/ideapad/s-series/IdeaPad-3-14%2C-Intel/p/81WDCTO1WWENGB0
If you're willing to spend just over £600, you could put a real graphics card in this Lenovo, aside from the other upgrades. The available cards, an MX330 or MX350, are not on the same level as the gaming graphics cards I mentioned earlier, but they're both much faster than the integrated cards in the other options. That's the difference between medium and high graphics settings. Plus, the dedicated card would use its own memory rather than borrowing from main memory (RAM) while you're playing, meaning the rest of the system would have full use of its installed RAM.
https://www.lenovo.com/gb/en/laptops/ideapad/s-series/IdeaPad-5-14IIL05/p/81YHCTO1WWENGB1
There are a number of options for customization, depending on which model you look at, and I can describe the benefits of each one if you want. But the first question is how much you want to spend, and the second is whether you like the look of any of these laptops enough to consider them as options. Let me know either way.