I’d try Kendamil brand. This one has the best reviews and a lot of posts on this app regarding formula always has Kendamil as the most commented to be best for their LO.
All babies are different a particular brand may work for some babies but not for others. From my experience though I started with Cow and Gate but my LO was constantly being sick after feeds, I changed to Kendamil and she’s been fine ever since
All first infant formula is heavily regulated and contains the same key ingredients. Unfortunately every baby is different for which one suits them. I’d start off with one that is easy to get hold of near you though. Equally because of the required ingredients if you do need to change to a different brand because it doesn’t suit your baby that is fine to do. We found the ready to drink pre mixed liquid versions really useful to start off with and still have a couple of 200ml cartons for days out as it doesn’t need to be kept in a fridge