In the UK, it is standard practice not to charge; there is something called the "Strasser Scheme" which almost all airports have signed up to which promises not to charge diverting aircraft in an emergency. I think a couple, such as London City, have opted out, but most have joined.
In Holland, I'm not sure. I have had to divert once for weather, and this was into Hilversum. They charged me the landing fee as normal, and as I had decided to stop for lunch and make the most of it, I did not argue.
However, having dealt with the miserable ****s at Eindhoven, I'd be very surprised to see any leniency. They charged me 250 Euros in total for my 2 hour visit in a C172, and told me quite frankly that they were setting their charges to try and get rid of GA. They're one of these airports that has decided they are too big and important for the smaller aircraft, simply because Ryanair have decided to exploit them, and I would love to see them fail!