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Bit of a dredge, but tuppence on saws is CORDLESS circular saw (go brushless if you can), 240v track saw.
Cordless for rough work / construction / when you need to cut something quickly or in an awkward / precarious place.
240v track saw because half the point of a track saw is dust extraction, if you’re spending out on track saw, spend £50-80 on a shop vac with power take off. If you’ve got a hose connected might as well just plug it in and start the vac every time you start the saw.
I've got circular saws in full-size and mini cordless versions, and they stay in their boxes. I almost always prefer the track saw. It's easier (just line up two marks) and more accurate as you can clamp the tracks. Also the rubber edge on the track gives you a really smooth edge, and you can do angled cuts easily.