Laptop/pc which is able to run sims 3 and 4??

Don't get a laptop, they don't work very well with PC games. It's best to get a good desktop PC with plenty of memory, gForce, Windows 10 & make sure that it's upgradeable.
I made the mistake of getting a laptop & it only lasted 3 years. Then I got smart & reached what would be a good PC for gaming that was that least expensive & great quality.
I got an HP desktop PC with Windows 8. Then over 4 years I upgraded my software that Windows 10. Over 2 years later I got a newer monitor.
My desktop CPU tower & mouse is 7 years old. I've been playing Sims 4 & Civilization V since 2014. Also 6 months ago I replayed Sims 3. I was amazed how the old game looked on my desktop, especially with my new monitor.
Also, Sims 3 doesn't freeze up anymore & I can finally get the simspoint games for my Sims 3.

Are you traveling often or do you need a “gaming laptop” wherever you go?

If otherwise, I suggest building a desktop PC.

@SERVERFRA

Do you remember vaguely how much it cost? If it was over £300 do you think I could get a similar machine second hand for a lower price?

Thanks for your help!

Mine was new when I first got it & cost $800.00 Today that would be equivilent to $2000.00