Flower stalks turning yellow?

[Gobby]

Have a few differant chilli plants in the greenhouse, all doing well apart from one, it flowers and the fruit sets absolutly fine, but soon after this the stalk the fruits on turns yellow and the lot just falls off the plant.

Seems to me it's just like an apple tree dropping it's fruit if it has too many, but this is happening to every fruit that sets.

The plant looks fine and gets an occasional feed of standerd tomato fertilizer.

Any idea's?

[Gobby]

[Gobby]

still happening, not spreading to other chilli's so cant be a fungal thing