This is, in fact, a Freight Rover 300 series. If you take a closer look at the front grille, you can make out the characteristic Freight Rover badge. The reason it looks a lot like a Leyland DAF is because the first vans to be produced under that name (the 400 series, if memory serves) were built on the Freight Rover 300 chassis.
Added by Bomba Boy on 26 June 2009.