I'm not too clued up on this but how are they planning on making it work? At present all working folks pay National Insurance and income tax which goes towards funding the NHS so that everyone can get care. Yes it's fairly massively inefficient and can be a ballache but if it were to be privatised, would it no longer be publically funded (i.e. as with the States we'd need insurance)? If we continue to pay NI and income tax, how will it be decided how that is spent on the numerous private companies? Not sure how it could be made to work...
Edit: But yeah, I don't know how any profit making organisations can be expected to make the correct decisions in terms of patient care when any expensive treatments or whatever will simply be eating into their profits. It's bad enough as it is with the NHS being something of a postcode lottery (as I understand it).