| Tier | Provider Type | Response Time | Avg. Cost (Emergency) | Technology Used | | :--- | :--- | :--- | :--- | :--- | | | National Chains (e.g., Dyno-Rod, Metro Rod) | 1-2 hours | £150 - £250 | CCTV, HPWJ up to 3000 PSI | | Tier 2 | Local Independent (e.g., Coventry Drainage, Blocked Drains UK) | 2-4 hours | £80 - £150 | Manual rodding, lighter jetting | | Tier 3 | One-man operators / Handymen | 24 hours+ | £50 - £100 | Basic plungers/snake; no CCTV |