Posted: 08/08/2015 at 07:02
Aubergines are self-pollinating, same as the toms. It does sound like a pollination problem even if the toms aren't suffering the same problem. Try giving the newer aubergine flowers a flick with your fingers to kick start the process.
Aubergines also like a bit of humidity. A problem when you're growing them in a greenhouse with toms, for which humidity is a recipe for fungal problems.