Vodafone UK have confirmed that the Galaxy S4 will be coming soon to them, and they have started taking registrations of interest on their webpage: www.vodafone.co.uk. While a price plan has not yet been announced, it will be announced soon.
Vodafone add that this will enhance the range of ‘4G’ phones that are already available from them. While 4G is not yet available from Vodafone, they promise to start it soon, and will be discussing the various options available with their customers in the applied areas.
More information about 4G on Vodafone can be found here: http://www.vodafone.co.uk/4G/ready-for-4g/index.htm