I see people talking in square metre, surely concrete is a cubic metre?
I have to agree with Dave, recent-ish tarmac driveways are crap. Two houses, by two different housey companies, both tarmac, neither could take a jack and certainly not an axle stand. They both sunk.
Dave where abouts in Derbyshire are you? I might need some work doing.
I'm in Swadlincote,just outside Burton on trent, Happy to advise, give pointers etc on any future project you had in mind
BUT sorry ,I have too much work
OK, I hold my hands up
Tarmac ,laid well (good compaction,no ground movement,good drainage,so laying it over concrete is not great drainage wise,) is ok as a surface.
I would still say block paving is a better choice long term
block paving has downsides too ,one being spilled oil staining ,you can seal block paving (there are good and bad sealers) how slippy block paving is once sealed is another story , worth having a few spare block pavers to replace any that get stained (bit of a garden path round the back ,so they weather ,and can be used to replace any stained ones, should that happen)
plus block paving is recyclable in that you can relay it if there is any movement or you need to excavate for services
But each to there own , if you have good tarmac ,,great
if your putting down a drive on what was a front garden, block paving may be for you