We have been experiencing rats running through our extension cavities for many years. The rats then migrated to the kitchen roof space chewing through cables. Rat Detection were recommended by my local pest controller. Rat Detection came to my property and carried an extensive survey including all drains and sewers. They then produced an extensive photographic evidenced report of there works. This included the problem of an uncapped old drain underneath the property which I did not know existed. They then came up with a solution to my rat problems and came back and remotely repaired and patched the faulty sewer directly through a man hole( no dinging necessary) This company is excellent. I cannot recommend them highly enough. If you have a rat problem do not hesitate to call them in. Because they are so good they are very busy! That is a great recommendation!