Have you been watering? Don't know where you are in the UK, but its very dry here in London.

Yeah been watering 2x so the water rests on top and then i stop and let it soak they are in hanging baskets in a greenhouse in North East England , so a lot of water then can drain?

If they've been in the same basket for that length of time, is it possible they've run out of root room? If that's the case, its very difficult to ever give them enough water. Also, if the leaves which are dying are on runners thrown over the edge, that might be because they're unable to root themselves, and so give up and shrivel.

Some leaves go brown when there the older leaves. When did you last feed them? Take the brown leaves off.

i bought some feed that you apply every 3 days did it yesterday. What are runners I am not sire about that so do you think I may need bigger hanging baskets? Thanks bamboo you are a wealth of knowldege

That's as maybe, but I'm not that great with fruit and veg, not my thing really. Runners are the long shoots with a tiny plantlet on the ends - in the ground, these would root and grow into new plants. If you've just got a few brown leaves, but the majority are fine and the plants are growing well, I wouldn't worry about those, they do naturally lose leaves.