I think it’s extremely unlikely there will be any “forcible mass vaccination”. It isn’t even yet known whether any vaccine can impart a worthwhile period of immunity, nor indeed whether the risk of Antibody Dependent Enhancement rules out effective vaccines altogether.
The Mail story is just the usual anti-restrictions propaganda from the Right; they attack anything that impedes flow of profit to the richest. What were the health authorities meant to do? The government left the borders open too late and applied restrictions too late. In March, the health authorities were facing an impending tsunami of covid, staff shortages from both infection and increased demand, and hospitals likely to become infection hot-spots – remember that as late as mid-March, the government “plan” was to do nothing and let it rip through the population. Cancer sufferers, and chemo patients in particular, are vulnerable to infection; keep’em coming into hospital for treatment, when staff are the most likely infection vector?
Still, when the fatalities are mostly old people it has been popular to just write them off, “they’d have died soon anyway”, but apparently different logic applies to cancer treatment – when it suits the Right-wing media.