Cruise Control Fault Warwick Duo

I wondered if anyone had experienced this.
2010 Peugeot Boxer 2.2 Diesel Manual
Cruise switches on and light illuminates correctly at start of journey.
Cruise control light then switches off, sometime into journey, period/mileage not ascertained yet.
Cannot be reactivated until next start from cold.
Any troubleshooting assistance much appreciated.

Hi, this isn't a wind up but check all your bulbs are working. Brake lights in particular, I won't bore you with the details but something remotely similar happened to us and it was a duff bulb identified by my Nephew who is a technician.