Why does your Peugeot 306 petrol not start when it is warm when its cold no problem but when warm the motor turns a couple of times and stops repeated attempts and eventually it runs?

The issue you're experiencing with your Peugeot 306 could be related to a few factors, such as a failing fuel pump, a faulty crankshaft position sensor, or a malfunctioning ignition system. When the engine is warm, these components might not perform optimally, leading to difficulty in starting. Additionally, problems with the fuel injectors or vapor lock could also contribute to this behavior. It's advisable to have the vehicle diagnosed by a mechanic to pinpoint the exact cause.