I think the travel might make me a tad less than economic. If you fancy a go at DIY, I will happily specify it for you and tell you exactly what you need, in exchange for a beer in the afterlife I don't believe in.
That is super kind. I'll see what's under there when I rip out the rotten stuff as if it's paved like the left hand side, I don't really see what the decking is adding.
I think given that I'm in Bristol this is not something for you? Could be interested otherwise