Unresponsive mower (Eastbourne BN20)

Bosch Rotak 37cm mower, went across the garden twice then wouldn’t start again. Started briefly then no more. Seems like a contact problem (but might not be), had handle switch apart also cover off motor, can’t see a problem. If anyone fancies trying their luck? or else for spare parts or cable. About 5? years old. Summerdown / Old Town location