IMHO waiting until the disease is widespread in the UK before taking whatever precautions you deem appropriate is likely to be too late.
At present, long life foods, bottled water, latex gloves, disinfectants and other useful supplies are all readily available both retail and wholesale.
Panic is however contagious* and with todays "just in time" business model, it takes only a small increase in demand to result in empty shelves and all out panic.
IMO it is already too late to prudently stock up anywhere that knows you. If things turn bad as quickly as they might, do you really want to be remembered as the "hoarder" who perhaps should be "made to share" ?
Time perhaps to visit a large supermarket not near your home or work, and pay with cash.
If TSHTF, it remains to be seen what action our government would take, they might do too little too late and allow panic, infection, and fear to run riot*
Or they might declare martial law and enforce strict rationing, curfews, prohibit movement etc.
Neither prospect is very appealing.
It is of course possible that I am being unduly alarmist, and that nothing much will happen in the UK (remember SARS, bird flue, pig flue etc) However most preps have a reasonable shelf life and are useful for other emergencies too.
* both puns intended
