ibook ac adapter Europe

[Winos2Mac]

My sister is traveling to Europe tomorrow and She is wondering if her ibook adapter will work fine with the plugs and voltage in London. the UK voltage is 220, the ibook acadapter reads on the side that it can handle 100-240, so Im wondering if she just needs a plug adapter or a voltage converter to be able to charge and use the ibook in London?

here is the website for apple. http://www.apple.com/ibook/specs.html

Im thinking that all she needs is an adapter to make the plug fit into those British plugs, but I'd like to confirm just to make sure.

Thanks!