Some advice please 
Today I left work and drove home as usual. Soon after leaving I saw one of our works vans at a junction. It was driven by a member of staff with his wife in the front seat. They were in front of me in the traffic and turned off after about ten minutes to a residential street. There is no work reason they would go there I can think of.
Do I report it or just forget about it? It could be permitted (although I doubt it), and its pretty harmless in the scheme of things. But it is bugging me...