@PixieSDimples Sorry about the currency; I should have checked. However, in terms of prices at least, the situation is basically the same. The only difference is I found a couple of gaming laptops at a heavier discount than you'd see in the U.S.:
https://www.argos.co.uk/product/8440710?clickPR=plp:20:120
https://www.argos.co.uk/product/9375482?clickPR=plp:34:120
The graphics card in the second one is somewhere in the range of 50% faster than the GPU in the first, which for F1 is the difference between playing comfortably at medium settings vs. high, give or take your father's personal preferences for framerates and various graphics settings. I'd also be hesitant to buy a laptop with only 256 GB storage, but if your dad really isn't doing anything other than playing F1 and various tasks that don't take up internal storage (browsing the web, streaming music, etc.), it should be fine.
In terms of the options I mentioned before, this laptop is the cheapest among those that have the highest-end graphics chip. I actually didn't cover it because laptops that have this processor are usually more expensive, but it's a little better than the i7 I mentioned overall and somewhat faster than the i7 in F1 2021.
https://www.currys.co.uk/products/hp-15seq2510sa-15.6-laptop-amd-ryzen-7-512-gb-ssd-silver-10225070.html
The graphics card in the first option above is still faster than the chip in this one, but the gap in F1 2021 is not all that large on medium or high settings. (It doesn't run great on high settings on either GPU; on low settings, the Nvidia 1050 is a lot faster.)
I didn't find any laptops with an i7-1165G7 that were cheaper than the option immediately above. I did see an option with an i5-1135G7 for £500:
https://www.currys.co.uk/products/acer-aspire-5-a51454-14-laptop-intel-core-i5-512-gb-ssd-silver-10212836.html
As I mentioned before, you'd be looking at low graphics settings, but it looks like the game does run.
I also left out some cheaper options with the i5 and 256 GB storage: you'd be saving £50 at most, and the extra storage will probably be useful at some point. But those options are out there as well.
If you want to do some shopping on your own, just look for the same processors as are in the models above, or the graphics cards in the case of the first two. The newer Nvidia 3050 is even faster than the 1650, but the cheapest option I saw for one of those was £700.