The exception to the rule about pre-existing conditions denying supplemental (half private) coverage is that if employers cover the cost for a large group, even people with pre-existing conditions MAY be covered. You need to check - most likely the employer has a contract with a specific firm.
But for the basic, required insurance, no problem. I’d suggest a low franchise and free choice of doctors. You’ll pay about chf 1000 out of pocket each year for everything(drugs, doctors, scans, etc) , plus the cost of insurance (whatever your employer does not pay). I pay about chf 4800 a year for my insurance. Might be extras if you have half private.
If you have BUPA or something similar, you might want to keep it just in case, and definitely if your position here is temporary. Swiss insurance will almost certainly not pay for a UK consultant.
I’ve been treated for breast cancer here (in Bern), just early stage though. I have only basic, required insurance and my treatment has been excellent. You have a lot of choice. There’s a breast center in Zurich, as well as the university of Zürich. Both are quite good.
You’ll most likely need to switch to a Swiss team for care. Most docs speak excellent English, (research is all in English), there is participation in clinical trials. My docs did fellowships in the US.
My care in Switzerland is every bit as good as care I would have received in the US at a comprehensive center, minus the bullshit one has to deal with for approvals and mystery copayment. I thought it far more efficient than the US...i know it’s not the UK though.
More and more hospitals are eliminating their 3 or 4 patient bed rooms too.
If you need further info, please send me a private message. All the best to you and your wife. Hope she’s doing well.