I saw a mouse, where, there not on the stair, where not on the stair right there.

Exciting morning.  Exited property at 5:20 am.  On release immediately noticed movement coming from underneath the decking.  Hugely interesting and senses on full alert.  Went and sat where there is a small gap where the decking meets the path and peered down into the void.  I then used my ears to listen for signs of life and pounced about on top the decking for a good half hour.  The Tall One is a little worried, mice she can just about cope with but the idea of dare I say it a possiblility of R-A-T-S she cannot bear to comprehend.  Note to homeowners, do not put up decking it not only attracts vermin but monstrous slugs.