So what? Why are they showing this to you anyway? Looks like they have a lot of work to do when they have completed the purchase. Personally I would not entertain such a gambit to get a reduction. I would stick to the price, take or leave it. Caveat Emptor!
100% this. To me, getting the EICR done is just to know what you're going to have to do to the place once you've bought it.
People do try to use it as a bargaining tool but i'd tell them to sling it.
If they are bothered enough that they've had this done and then make an offer, play hardball. They're not going to not buy their dream home for say £200k because they've got to spend £2.5k on a rewire at some point.
The price for my house was £X. I didn't try to negotiate 10 grand off for the windows that needed replacing, or 8 grand for the new kitchen i've had to put in, or 2 grand for the bathroom, or the grand for the rewire. You buy it, your problem as far as i'm concerned.
I put my Mondeo up for £650. Some guy on facebook offered me £400 straight away. I accepted. The car was in a mess, bodywork very poor covered in dents, scrawps, scrapes, dings. Brakes needed doing. Exhaust was rattling and needed pinning back up. All this was in the advert and i told him about it in the message before he came to get it.
He gets here, test drives it, and then tries to knock me down to £200 because of 'all the stuff i've gotta do to get it right' it's like howay mate you're gonna break it you're not reselling it as a driveable car.
He walked off after i told him the condition of the car was taken into account when i accepted £400 and i wouldn't budge. 10 mins after leaving he messaged me and paypal'd me the full lot.
When someone wants something enough to warrant making an offer, play hardball, they will most often not walk away.