How depressed should one be about the HS2 go-ahead? The cost is stupefying. The offering to the north — considered so important politically — seems to be unappealing to plenty of northerners and, like a parody of British railway late arrivals, won’t reach its destination until the mid-2030s. Worse, perhaps, is the sense, especially when seen in conjunction with the Huawei go-ahead, that the government is already trapped by the past.