I have absolutely no problem with people parking outside/near my house for short periods, that's part and parcel of having a terrace (yes I'd love a drive/garage etc…. unfortunately those aren't free..)
The issue I've got is it's not moved in 6 weeks and looks unlikely to.
At the end of the day, why hasn't the owner parked it outside their own place? – most likely for all the reasons I've mentioned, it's big, ugly, blocks light and causes parking / passing issues.
So yes a bit of NIMBY, but justified I think, doubt many of you would be too happy with a perm camper come lorry outside your front window.
Unfortunately unless it's untaxed I don't think I have any actual rights to get it moved so going to have to put up with it (unless anyone can come up with something I don't know)