Nearly half of our trade is with other EU countries, and the “outers” cannot say how British businesses would be affected by any of their scenarios for exit.No, Lucy: "nearly half of our trade" is not with other EU countries, actually.
At any time, around 80% of "our trade" is internal. Our actual trade with EU countries is, in fact, about 10%—very far from "half" (and it is more like 8% when the Rotterdam effect is taken into account).
This might seem like nit-picking, but Lucy Thomas is the campaign director of pro-EU Business for New Europe organisation: we can expect organisations like this to step up the peddling of these subtle lies as the EU referendum approaches.
We need to be aware of them, call out those asserting them, and debunk them on a regular basis.