Yes. A dual-fuel cooker's gas system is still present even when the selected cooking function is electric. Stop troubleshooting the appliance.
What the observation means
For a suspected gas emergency in Great Britain, call 0800 111 999 from a safe place and follow the emergency service's directions. Do not operate electrical switches, create flames or try to locate a leak yourself.
A useful next step
Tell the emergency responder that the appliance is dual fuel and what you noticed. A working electric oven does not make the gas concern harmless. Ordinary repair booking should follow only after the immediate safety issue is addressed.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.