That dinky little saw in the OP is for cutting things like floorboards without going thru the joist/pipes underneath.
Following this thread with interest as I'm also going to need kit for sleepers, slabs and big timber when we landscape in the next few months.
It'll be fine for most wood work, it won't go through the sleeper obviously but will get most of it done probably, guess that's why I asked
I'll probably get something like the below, If o get a mounted one like a mitre saw I don't that will help at all.
https://www.screwfix.com/p/evolution-r185ccsl240-1200w-185mm-electric-circular-saw-220-240v/285fj
Something like this.
Going bigger carries much more cost. This would get you 65mm through, so you'd need to flip it and cut again.
Or you could hire a big one.