Final answer:
A voltage converter or transformer will allow your computer to run on 230V AC in London.
Step-by-step explanation:
If your computer was previously configured to receive 110V AC and you need to run it on 230V AC in London, you will need a voltage converter or transformer. A voltage converter or transformer is designed to convert the voltage from one level to another. It will step down the 230V AC to 110V AC, allowing your computer to safely operate.
A plug adapter is used to adapt the physical plug shape to fit into different types of sockets, but it does not change the voltage. A power strip with surge protection helps protect your computer from power surges but does not change the voltage. A universal power supply is designed to work with different voltage levels, but it typically requires manual adjustment or has a switch to select the appropriate voltage.