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I can’t say anything else occurs other than it kind of gives warning signs that it’s about to stall, you can feel it trying to stall, then after say about 25 mins of driving it’ll stall. Also once been running for a while it will cut out too.Got anything else to go on? When you say "randomly", is there anything that seems to frequently occur at the same time? Like does it tend to happen times when you've been driving for longer than 20 minutes, or the same days you happened to also put petrol in... that sort of thing.
Have you checked for fault codes?