we arrived in Porstmouth and discovered that my husband's passeport was...out of date ! After a lot of "talking" with different P&O personel, I talked to someone very nice in customs and they explained the problem was not in fact with P&O or with England but with France as they might not allow us in the country, but we were allowed to take our chance. I then decided to phone the customs in France in Cherbourg and I explained the situation and they replied it should be OK, took our details etc.. Of course when we arrived in Cherbourg there was no checking of identity anywhere so there was not a problem. But it might be more difficult now for half-term ? Anyway try your best but remember the problem might be when you arrive in France.