Cluster Flies, rats, squirrels and moles

Cluster flies have started becoming a problem early this year. We have had 3 jobs involving them already over the last 6 working days. We had been blocking roofs to stop squirrels getting in and have another one to do in Stonehouse  next week. Rats are still proving to be a problem with jobs in Gloucester and Cheltenham. We have about 16 mole trapping jobs going on at present and as soon as we finish one, another one comes in, almost straight away. This is quite strange, we have never been this busy with moles before.