If French is the language of love, then presumably a French restaurant should be where I head with my true love on Valentine’s Day. Certainly, the leading French chains are using several seduction techniques to secure my custom – and for good reason. February is a slow trading month and an event where consumers might be more inclined to loosen the purse strings for fear of having their heart strings damaged, is well worth aiming to capitalise upon. So who offered what on the big day?