According to the carriers' official Twitter accounts, Three and O2 will be getting the HTC Desire S. Orange and Vodafone will both be carrying the Desire S, Wildfire S and ChaCha when they're released in the second quarter of the year.
So far the only network to confirm that it'll be ranging the HTC Flyer tablet is Three, though the carrier made no mention of any exclusivity deal in its press release.
T-Mobile has yet to announce anything, though given the phones' widespread availability on other networks we'd fully expect them to carry at least one of them. In sort-of-related news, O2 has also confirmed today that it'll be carrying LG's Optimus 3D when it launches later in the year. [O2 on Twitter, ThreeUK on Twitter, conorfromorange on Twitter, VodafoneUK on Twitter, Three Media Centre]