Cheers for the interesting points. Yeah, without trying to be conceited I am quite a bit physically stronger than your average person (what makes me rather unideal for cycling has its benefits elsewhere, I have deadlifted 200 kg in the gym in the past and bench-pressed 150) - but I think you're right, they will indeed be very heavy nevertheless. I have proper tools for the job, I've built up loads of DIY tools over the years but I'll need a stone cutting blade for the old circular saw for sure ,there is a drain in the way by our back door.
Looks like enough slabs is going to cost us about £400 anyway - so we're looking at seeing what our local slabbing firm will quote - there's a firm that's paved over half the neighbourhood's driveways recently with ads outside every house - I think they are cheap or it wouldn't have been quite so viral.
We'll see what they quote, but it's always more satisfying to do the job yourself I find. No hurry either so I don't *have* to lay them all the same day.
I don't even possess a car so carrying them on my bike seemed a little unlikely anyway