Someone is definitely having you on.
If you can get hold of a copy of Gas Safety (Installation and Use) Regulations.
You should read through 36(4) and 36(3)
36(3) is very long but no mention of new cert when changing parts.
36(4) Is about making sure the operative is registered (gas safe)
(4) Every landlord shall ensure that any work in relation to a relevant gas fitting or any check of a gas appliance or flue carried out pursuant to paragraphs (2) or (3) above is carried out by, or by an employee of, a member of a class of persons approved for the time being by the Health and Safety Executive for the purposes of regulation 3(3) of these Regulations.
In my mind , Any work..... Includes parts being fitted. pursuant to means treat it the same as ? So if fitting any parts you should treat same as parts 3. part 3 is a requirement to do a safety check? How should you record the safety check?
(c)ensure that a record in respect of any appliance or flue so checked is made and retained for a period of 2 years from the date of that check, which record shall include the following information—
(i)the date on which the appliance or flue was checked;
(ii)the address of the premises at which the appliance or flue is installed;
(iii)the name and address of the landlord of the premises (or, where appropriate, his agent) at which the appliance or flue is installed;
(iv)a description of and the location of each appliance or flue checked;
(v)any defect identified;
(vi)any remedial action taken;
(vii)confirmation that the check undertaken complies with the requirements of paragraph (9) below;
(viii)the name and signature of the individual carrying out the check; and
(ix)the registration number with which that individual, or his employer, is registered with a body approved by the Executive for the purposes of regulation 3(3) of these Regulations.
A CP12?
Sorry , I stand corrected..... Landlord has to ask u for info, your not required to issue unless requested. It's the landlords duty to keep records.
But question was what should you do? I would strive to exceed the minimum legal requirements and as a CP12 isn't that much additional work. I would complete one as good measure. Tennant feels 'safe' landlord got a cert and a new 12 month cert, you have peice of mind that you have checked appliances and detailed defects and thus discharged your duty of care by ensuring beyond reasonable doubt and as far as reasonably practicable that the job was left in a safe and serviceable manner?