Having scanned the text admittedly very quickly, two things stand out.
The first thing, there are many references to buildings, or properties, and not goods, and secondly the time scales for making claims are not as clear cut as has been suggested by other contributors.
I am not in a position to categorically say this act is not applicable, but it is certainly conspicuous by its absence in other retail purchase cases.
It reinforces my concern that the OP really does need to take professional advice.
Thanks everyone for your support - nice to have.
If the moderator is happy - I am happy to stay on this post - hopefully I will eventually be able to add some clarity for everyone, so that could be helpful.
I think you may be right in that the Latent Damage Act is specific for properties (i.e. houses, commercial builds etc) - I knew about the Act and have actually read several legal reviews on it and they only refer to bricks and mortar cases.
However, I will raise it once I can get an "audience" with our Family Legal Protection Insurance solicitor. He is v good and knows his stuff (he deals with anything on wheels; including high end cases!) but his remit is currently too narrow in that he has only been tasked with looking at our 2014 incident (i.e. at the time of purchase ). He has already dismissed this 2014 breach as out of time and the warranty too narrow to help or at least with a greater than 50% success rate (but I guess no-one has ever tested Elddis' interpretation of the warranty in court - that would be for another day!)
So currently I am awaiting on the Family Legal Protection Insurance Claims Handler Supervisor to enlarge their solicitor's remit to include our important 2018 breach (i.e. the defective repair).
The Insurance company has mis-interpreted their policy wording. They should be looking at both the 2014 & 2018 incidents as they are linked - but they have only investigated the 2014 incident to date.
I have written to the Insurance company to prove that they have erred by reference to a very useful (& definitive) case in the Court of Appeal in Jan 2022 (this is regarding the aggregation of claims with the same "originating cause" - this would be the 2014 & 2018 claims in our case - but don't worry about these details).
Whilst waiting for the Insurance company to reply, I received some valuable documentary evidence from Elddis/and the dealer using the "Subject Access Request" procedure - these help my case.
A "Subject Access Request" is a powerful way to obtain evidence that you currently don't hold.
Did you know that it is an offence for Elddis or the dealer not to provide the requested documents within 30 days of written request? Our Expert put us on to this.
I wrote to both Elddis and the dealer independently and asked for copies of all emails between the dealer and Elddis over specific dates; all documents and photos that they hold regarding to the repair done in 2018 including the so-called "warranty claim form"; all invoices for the repair etc. etc.
For anyone thinking of using the "Subject Access Request" procedure there are templates and information available online (including Which? pages).... it's totally free and you've nothing to lose.
Will keep you posted