I have some pepper plants growing in my glasshouse which I cultivated from seed. I sowed them in the glasshouse in early June. The plants are thriving but there is no sign of any fruit yet. When can I expect the fruit to appear or can I do anything to encourage fruit
You need flowers to form first, and set, and then the fruit comes quite quickly.
It may be that you are getting flowers but these ae not setting, either due to rapid growth or lack of pollination, or both. Taps the plants each day to release pollen.