If there is a surface drain nearby, as I think there is on my plot with the surface drain being located in the approach road, is it acceptable to connect to it and discharge rain water to it, and thus avoid the need to incorporate soak-aways for roof rain-water as, for example, @JSHarris did in his build?
My site is cramped so it would be nice to avoid the need for soak aways for roof rain water.
I am a complete beginner in this area. I have skip-read Section H3 of the Building Regs.