EV charger installation problem

[8bit]

We're trying to get an EV charging point installed in advance of our car being delivered. The company we are using said they need to apply to the electricity network company (SSEN) to have the master fuse uprated. SSEN have replied saying they can't simply do this because our electricity supply service is "looped" and that they will have to perform an "Unlooping Diversion" job beforehand. According to the diagram they sent, the feed for the building (we live in a semi-detached house) comes into our property and then loops on to the adjoining neighbours'.

From the wording in the email it seems that we're expected to pick up the cost for this - has anyone had anything similar and able to suggest what the cost might be?

[8bit]

By DNO do you mean SSEN, or whatever company owns and runs the power network? If so then yes I'd have expected that it should fall to them to pick up the cost - the network is their property after all, not ours.

The fuse we have now is 60A I gather and the installer said we'd need at least 80A.

[8bit]

Thanks all. We contacted the installer to see what they advise, no response yet but will chase on Monday. I was present when he did the site survey at home, he took one look at the master fuse, saw it was 60A and immediately said that would need uprating. There was no discussion about other devices consuming power etc. and no calculations were mentioned.

We have electric underfloor heating in both bathrooms but this is not the primary heat source in either room and neither floor area are very big. Other than that we have an inflatable hot tub (normal 13A plug), induction hob, beyond that just the usual kettle, toaster, wife's hair dryer etc. No idea what that all totals up to, I guess we should be able to work it out, at least ballpark.

I don't understand why we have to unloop the supply just to change the master fuse for a higher-load one either - unless that fuse protects not just our property but the neighbours' too? I begrudge paying for this as well, the two properties are separate so this feels like being made to pay to fix a corner that was cut (through no fault of ours) when they were wired to the mains in the first place.