The HTC One has been the most popular smartphone of 2013..the new variant of ONE is coming with dualSim and a micro card slot in uk.
it will be live just because the previous version of ONE didn't have micro card slot and dual sim.

No release date is still finalized  but it is supposed to be released before Christmas
The New Variant of HTC One is available for Pre-Order right now.
the price of 32GB will be £475 on HTC's Online store.

Source:GSMARENA.COM