I posted last week that I was getting a damp soil smell coming from the drain in my bath. A few people helpfully pointed out that this was probably caused by the trap in the bath emptying itself of water and letting the smell through. Only problem is that the smell has now appeared in the kitchen and I notice when it rains heavy outside the smell definetly gets worse - the only way I can get rid of it is to keep the plugs in but I am really worried about what can be causing this and if there is maybe water gathering under the house (wouldn't explain why it then only comes up the kitchen and bathroom drain?). I have another downstairs WC but no smell from that drain (although it is at the other end of the house). Any ideas folks