June 5, 2025

Home‑owners often ask why rats suddenly appear in the loft when the bin store is spotless. The answer is usually below ground. Britain’s sewer network is a vast rodent habitat: estimates put the national rat population at about 80 million (The Guardian), and drainage specialists reckon a large slice – tens of millions – spend their entire lives inside pipework and chambers. When that pipework fails, the rats simply follow the fault up into our buildings.








