Thanks for the advice, will stick with rice for the next few weeks then re-try the fruit. It just seems to give him bad wind (like breastmilk used to when he was born!)
I started to wean now under the advice of a health visitor because he had begun to wake in the night again, wasn't gaining weight, was going less and less time between feeds, and was fussing after feeds but not interested in having any more breastmilk.