I have just found out that my conservatory down pipe drains into the foul water drain. The conservatory was built over ten years ago and up until now I didn't realise I had a problem. Does this mean I have to rip up my patio to install a soakaway which is going to be extremely difficult given the site conditions, would this mean I would need building regulations, or is there any other option. The person who built it is unfortunately no longer with us so I cannot go back to him.