While on this subject let me have a little rant about people who park in the pick-up bay while they just nip into the store. 
For 20 minutes or so  
  .
Also those who think it's o.k. to park in the spaces showing a push chair because they have a strapping teenager with them  

 . The extra space in those spots allows room to get a little child out without knocking the car next to it.
 On second thoughts I don't want a stroppy teenager flinging the door open next to me in the ordinary parking bays either.  
 Rant over and I feel much better now  

 .