Got to work this morning and when I changed my shoes (I don't like driving in heels) I discovered a large hole in the toe of my tights. Large enough for most of my toes to poke through but not large enough for them not to have blood supply cut off by the tights!
Fortunately the hole hadn't resulted in a large ladder snaking up my legs, so rather than abandon the tights altogether (and then have cold, rubbish looking legs), I spent a while trying to tuck the hole under my foot. When that failed, I simply stuck it in place with sellotape. Hurrah! Problem solved, noone any the wiser. I still maintained my air of professionalism despite wearing tights held on by sellotape.