Whipped into a frenzy ...
Grrr & doh - swapping over an O2 simcard to a different handset, looked away for a moment, and the sim had vanished!
Spent almost an hour searching: under chairs/bags/ in books etc. On giving up, rang for a replacement; then headed for shower. On whipping down longjohns, out fell my ... sim.
How on Earth it got there, I have no idea. Hoping scratching of unsavoury areas weren't involved.