Dear Tobias and Malcolm
My apology to you both. I have been doing some further research and you are both correct the vehicle is a Poinard.
What I have found is an extract from the 1952 French Motor show guide as follows
The manufacturer of Poinard sidecars has decided to copy others by producing a town carrier which it showed on its stand in the main hall of the cycle and the motorcycle show in October 1952.
For this vehicle, Poinard have not completely given up the technique of two wheeled vehicles, since its new creation preserves the handlebar from a motor bike; the Poinard approach is similar to the three wheel Italian Vespa or the Indonesian rickshaws.
This hybrid vehicle offers a saddle for the driver, but its two passengers have a bench seat. This represents a capacity of three passengers and one can wonder whether the Poinard has enough power to carry such a weight
To transport three passengers in its small three wheeler, Poinard envisage only one motor a 125cc with little performance when fully loaded. The handlebar arrangement comprises the brake and clutch, as well as the starting handle.
I do hope this information is of assistance to yopu both.