ONE can learn an excessive amount of into the Liberal Democrats’ storming efficiency at yesterday’s by-election in Witney, the well-heeled Oxfordshire seat vacated by David Cameron’s resignation from the Home of Commons. In interviews this morning a visibly ecstatic Tim Farron hailed the consequence—an increase in his social gathering’s vote-share from 6.7% to 30.2%—as proof that his lot are “again within the political huge time”. “We’re the comeback youngsters!” he gushed.