
Two leaks in existing pipework
After Cadent isolated the supply, TNG traced two leaks in old black iron pipework. The job also addressed separate wall-sleeving and bonding defects.
Read the Bushey investigation →For a Welwyn Garden City property, TNG Services can discuss the landlord gas safety check, access and record. Share the installed gas appliances and explain any tenancy changes, maintenance requests or known faults before booking.
Share the property address, appliance list, previous record and access arrangements.
The relevant appliances and flues are assessed by an appropriately qualified Gas Safe registered engineer.
Keep the record, provide the tenant’s copy and arrange any necessary remedial work.
Showing the single result
If a gas appliance was replaced, removed or newly provided, make that part of the enquiry. The previous record is useful history, but the next check must account for the current installation and relevant responsibilities.
Include available installation paperwork and information about earlier recommendations. This helps avoid assuming that the property remains unchanged from a previous visit.
These examples come from gas leak investigation and boiler service visits. They illustrate defects found during TNG’s work; they are not presented as completed landlord CP12 inspections.

After Cadent isolated the supply, TNG traced two leaks in old black iron pipework. The job also addressed separate wall-sleeving and bonding defects.
Read the Bushey investigation →
An inspection found incorrect flue fall, inadequate support and securing, and an unsleeved gas pipe wall entry. The installation was classified At Risk; the article documents the findings rather than completed repairs.
See the Stevenage findings →
The boiler operated with satisfactory combustion readings, but the visit identified a flue defect and gas-pressure concerns. Separate cylinder and visual electrical observations were also recorded.
Explore the Borehamwood inspection →Yes. Describe changes to the gas appliances so the current installation and the requested checks can be discussed.
Send the property postcode in Welwyn Garden City, the gas appliance list, previous record and due date if known. Explain access arrangements and any existing faults or notices. Avoid unnecessary tenant personal information.
No. The record contains the completed check results. Read the findings and arrange any required remedial action; an unsafe appliance must not be used.
Landlord checks are required annually. Existing tenants need a copy of the record within 28 days; new tenants need it before moving in. Retain records for at least two years, with additional retention conditions when using early-check flexibility.
Read the main landlord gas safety and CP12 guide →Share the property details and the work requested. Coverage, access and the proposed appointment can then be confirmed.
Arrange a gas safety enquiry