i am looking for a shelter/canopy to go on Mercedes van when back boot lid is up when parked up at a show Seen one at blackpool in car park I have looked on ebay and gumtree but cant find what i am looking for
Anyone have any idea?

www.waggitt.co.uk/.../SILVER_REFLECTIVE_SHEETS_COVERS.html

Carnopy did a good shelter but I don't think they make them any more.  You may be able to find one second hand somewhere though.  It is a domed gazebo but only 2 legs, the top part fits onto the back of the tailgate, the other supported by the legs.  You used to be able to get side panels too

At agility shows dogs are regularly left in cars/vans whilst owners walk courses and the most common way to keep cars cool is to use silver reflective sheeting. I leave the tailgate open and put reflective sunscreens on the front window and then cover the side windows with white sheets - Tesco value range - which I put inside the car, from one end to the other and then hold it in place by shutting the doors. I use a large garden tarpaulin to cover the tailgate and this hangs down both sides of the tailgate and is held in place by large plastic clamps that I attach to the tailgate. I hold the front of the tarpaulin up with two tent poles and create a shady area under which I can sit.

The car is far cooler than the outside temperatures and my dogs always choose to sit in their car crates in the cool - long coated breeds.
I did buy a gazebo that went over the car but found it wasn't as effective as the method I now use and in a slight wind the legs on it bent despite it being pegged down - it was purchased from Halfords and I wouldn't recommend their pop up gazebo.

There are quite a few companies that make covers for cars depending on how much you wish to spend.
http://www.caranex.com/

http://www.khyam.co.uk/detail.asp?p=1225

http://www.driveaway-awnings.co.uk/outdoor-revolution-outhouse-xl-handi/

If you search for tailgate awnings you should find a range of them at different prices