They are wrong.
The only need for an EICR at change of tenancy (up untill April 2021 ) is if there isn't a current in date EICR.
Unless I read it all wrong when it first came out.
You are correct.
property just needs to have a current eicr that is within its date range.
needs to have been done before tenancy started and at no less than every 5 years.
in your situation, the report has been done before the tenancy started (6 months or more before) and no need to renew it until 5 years is up, even if there was a new tenant moving in.
Duties of private landlords in relation to electrical installations
3.—(1) A private landlord(
1) who grants or intends to grant a specified tenancy must—
(a)ensure that the electrical safety standards are met during any period when the residential premises(
2) are occupied under a specified tenancy;
(b)ensure every electrical installation in the residential premises is inspected and tested at regular intervals by a qualified person; and
(c)ensure the first inspection and testing is carried out—
(i)before the tenancy commences in relation to a new specified tenancy; or
(ii)by 1st April 2021 in relation to an existing specified tenancy.
(2) For the purposes of sub-paragraph (1)(b) “at regular intervals” means—
(a)at intervals of no more than 5 years; or
(b)where the most recent report under sub-paragraph (3)(a) requires such inspection and testing to be at intervals of less than 5 years, at the intervals specified in that report.
(3) Following the inspection and testing required under sub-paragraphs (1)(b) and (c) a private landlord must—
(a)obtain a report from the person conducting that inspection and test, which gives the results of the inspection and test and the date of the next inspection and test;
(b)supply a copy of that report to each existing tenant of the residential premises within 28 days of the inspection and test;
(c)supply a copy of that report to the local housing authority within 7 days of receiving a request in writing for it from that authority;
(d)retain a copy of that report until the next inspection and test is due and supply a copy to the person carrying out the next inspection and test; and
(e)supply a copy of the most recent report to—
(i)any new tenant of the specified tenancy to which the report relates before that tenant occupies those premises; and
(ii)any prospective tenant within 28 days of receiving a request in writing for it from that prospective tenant.