I'm pretty sure Birkenhead Central Library has A0 copying facilities, but you'd better phone and ask.
Prontaprint are the obvious commercial business, staples might be able to as well.
You can do it with a decent camera - get a good distance away, at least 10 times the document size away and using optical zoom (I've done it down a stairwell before now).
In a time of universal deceit - telling the truth is a revolutionary act. George Orwell
When the debate is lost, slander becomes the tool of the loser. Socrates