Thinking about this case some more, I've read through most of the press items available but have learned absolutely nothing about Claire or her circumstances.
In 2022 she bought a 20 year old white Transit-based van which is described in most press reports as a camper van but I haven't seen a photo of the vehicle anywhere.
It's therefore not clear whether this vehicle had originally been built
as a camper van or properly converted to camper use, eg
https://www.autotrader.co.uk/motorhome-details/202512288815765?advertising-location=at_motorhomes.
On the other hand, it may simply have been the sort of Transit van that has traditionally been bought for commercial use by tradesmen and hammered into the ground with a very high mileage before being sold off cheap. If this is the case she probably paid very little for it and it may not have been in particularly good condition when she bought it, although it managed to pass its annual MOT test and remain on the road. In this case Claire may simply have had an inflatable mattress, a sleeping bag and some rudimentary cooking facilities in the back of it.
We don't know whether she was effectively permanently on the road or took off during holidays and leave from work. If the former, how was she funding her travels and what was she living on? If the latter, what work did she do? Has she ever worked in practice? Did she pick up seasonal work in tourist areas, eg bars, hotels or waitressing, or do WWOOFing or busking/begging? Or did she just bum about scraping a living on benefits?
I haven't seen any family members named. There have been comments from "the family" but who are they?
TBH, I wouldn't be surprised to learn that Claire had longstanding and significant mental health problems.