Lawnmower - spares or repairs (Southwell NG25)

Have a small electric lawnmower.
Has served me well for years.
Recently - it would start, and then the motor cuts out.
I wonder if it might be a loose connection, so if someone has time and inclination to investigate you are welcome to it.
or if it's otherwise useful to salvage parts from.

Video of the stop start can be seen here :
https://photos.google.com/share/AF1QipN8wI-Mts9rq1Q4LvsCfHfIBjl27n2Bp8XzC0W...