I used to feed mine on tomato feed when the fruit started to show.

Yes I also use tomato feed or the general growmore pellets will help.

Thank you Dungy and Cammomile, I will give it a go. Someone told me Miraclegro, but I could find nothing in their literature that said it was right for Aubergines.

I've never used that on vegetables, just the flower garden.

Its calledMiracle grow gro your own 'vegetable and Fruit' must admit In have not come across anyone who has heard of it yet.
Thanks for your help.