As a UK citizen, you have automatic entitlement to receive state healthcare in the Republic of Ireland, enjoying the same benefits as Irish citizens. To avail yourself of this healthcare, you may need to provide proof of residency, such as a driving licence or passport, to the treatment facility.
However, it is important to note that these entitlements do not replace the need for private travel insurance. While you have access to state healthcare, it is still advisable to have comprehensive travel insurance in place to cover other aspects of your trip and ensure you are adequately protected.