where are the fish gone to??????

I,ve recently fished the st david,s/solva areas of west wales,with not
brilliant results,ie-mackeral,the odd pollack,and of cause wrasse on the
float off the rocks.Some of the locals told me that the fish had gone to
deep water?I also fished barry last week and also ogmore deeps with
friends,and many other anglers with very poor results.We were using
ragworm,squid,mackeral and sandeels.But the fishing was still not like it
should be at this time of year.Is it the very warm weather and bright
sunshine causing it or something more sinister like pollution.I,ve even
heard of bad returns off the boats out in the bristol channel!So guys,some
ideas please.and where are the FISH. Alan newport