If you are living and working in the UK be sure to apply for a EHIC (European Health Insurance Card) It is free of charge! be careful of websites who try and charge you for it!
A valid European Health Insurance Card gives you the right to access state-provided healthcare during a temporary stay in another European Economic Area (EEA) country or Switzerland.
The EHIC covers treatment that is medically necessary until your planned return home. Treatment should be provided on the same basis as it would to a resident of that country, either at a reduced cost or, in many cases, for free. For example, in some countries, patients are expected to directly contribute a percentage towards the cost of their state-provided treatment. This is known as a patient co-payment. If you receive treatment under this type of healthcare system, you are expected to pay the same co-payment charge as a patient from that country
Please Note: The EHIC is not an alternative to travel insurance. It will not cover any private medical healthcare or costs, such as mountain rescue in ski resorts, being flown back to the UK, or lost or stolen property. It is also not valid on cruises.
It is therefore important to have both an EHIC and a valid private travel insurance policy in place before you travel. Some insurers now insist you hold an EHIC, and many will waive the excess if you have one.
If you are Australian, you will have to apply by post and send a copy of your UK visa. The website claims the turnaround time is 21 days & you will receive your card within 10 days of your claim being processed. Its handy to note you can still travel with out it, if you end up needing treatment you can request a certificate from the hospital you are at.
It is similar to the Medicare Reciprocal Health Care Agreements in Australia. Only it covers more countries!