Ooooohhh, I think I´ve got to excuse myself.
I reveal, that my source talked of the car as a "Equipment Sales Ltd." product from Blackburn.
As a non-native speaker I did not realize that the first part of the company name must have got lost in the photo subtext.
After doing some research, I´ve found another photo of this vehicle from another angle, but at the same spot.
It talks of the manufacturer "BTE Eqiuipment Sales Ltd." from Blackburn.
So now I´m sure, that one of the first answers was correct.
The point goes to
luispsSo i have to say sorry to all, who invested time to find the answer...