I bought one of the 3M Speedglas 9000 series helmets best part of 20 years ago. £300 odd. Yikes! But I wasn’t taking chances with my eyes.
It really is very good but I’ve occasionally borrowed £50 – £100 (ish) helmets which in my hands and on my work appear to perform just as well. Even the one with the snazzy flame graphics. So you will probably do fine if you don’t cheap out too much and take a chance on “who they” brands.
Concerning the comments about LiDL offerings, LiDL do have a deserved reputation for frequently feeling equipment that, in practice punches well above its price point. I suspect any auto darkening helmet from them would be more than adequate.
My first auto-darkening one was from Machine Mart of all places. Very expensive by machine Mart standards with a 10 year warranty. Maybe mid 1990’s era. Performed well up to par for the vintage and lasted about a week short of 10 years. Negotiating the warranty was “interesting” as Machine Mart didn’t sell auto darkening ones at the time so they had to honour the money back bit of the money back or exchange thing. The branch I got it from refused to believe they’d ever sold them despite me having the receipt.
Clive