SMS thread has 30 messages in it. It's more jittery, not smooth at all just jumps around, stopping and starting as it scrolls through.. Will try factory reset, but I can't remember whether it was like this when first bought.
Adobe Flash Player 10.1
Barcode scanner (bit of a novelty)
Nothing particularly big, or that I would have thought could slow down the performance of the phone.
Thanks for your help