By Andy Silvester Is a new Soho hotel enough to persuade you to give up the creature comforts of home for a Zone 1 weekender? Andy Silvester says yes It’s January; freezing temperatures, an overhanging sense of guilt over Christmas indulgence, and that indescribable but immediately identifiable smell of ‘wet’ on the tube. It’s hardly a surprise that thoughts turn to going away. So where will it be? The tree-lined beaches of Mauritius? The slopes of the Dolomites? What about… central London? So-called staycations are nothing new, but that usually means summer in Cornwall. A holiday in zone 1? S…