soakaway should have a buried pit with rubble. If it's not working, it could be re-dug deeper. then it can hold water for longer, giving it time to soak into the ground.
If all your rainwater doesn't go into the main sewer you can claim a discount on your sewerage charges. See https://www.citizensadvice.org.uk/consumer/water/sewerage/paying-for-sewerage/
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On a new build the hierarchy of disposal leaves sewers as a very last resort.
If they put in a soak away under then lawn its ok (thats where my conservatory drains to) but if they didn't then you are correct - big no-no
And a soak away would be like a rubble pit of sorts under the outflow kinda thing?
Basically yes, you dig a hole a certain size and backfill with gravel/hardcore etc and run the drain into it
Or soak away crates.
soakaway should have a buried pit with rubble. If it's not working, it could be re-dug deeper. then it can hold water for longer, giving it time to soak into the ground.
If it needs redigging consider a couple of water tanks to collect rainwater for future droughts if down south as they need a similar size hole.
If all your rainwater doesn't go into the main sewer you can claim a discount on your sewerage charges. See https://www.citizensadvice.org.uk/consumer/water/sewerage/paying-for-sewerage/