No knickers

Delayed again. New flight, not yet booked, will be on Sunday 2nd August. I am getting the distinct impression they don't want me out there. No sign of visa and BA have invented a special slot called MT as the seat has been changed so often they have designed a new database just to keep track of the constant changes. In the meantime I have run out of knickers and my socks are beginning to smell as I have everything else in the suitcase locked and ready to go and I can't find the key. My spare swiss army knife (I always carry 2 in case I lose one) may yet prove useful to cut into the case to release the unmentionables. Does anyone know where I can buy paper underthings?