Sally - 
I've nearly had two "bring your cat to work" days this winter!
The ex-stray with less than 9 lives left & a stump for a tail often "meets" me as I walk down the path on my way to work.
  trouble is... its 5 miles if he gets all the way! 
It was ok when I got a lift at the bottom, as he didn't follow the car but cutbacks mean my friend has her hours reduced.
I managed to "lose" him the first time when we were met by a greyhound.... he wasn't scared but wanted to befriend its owner!!
The second time, last week, I left him peering down a hole made by roadworks .... 
... its a good job he has the attention span of a goldfish 
 
 He's a b*gger for getting into cars & vans parked outside too ...