To ensure you are getting the best service when you hire a PAT testing company it has been recommended you look for one that is Local to you, so if you live in Ferndown, Verwood or Poole it is sensible for you to look for a company that offers PAT testing in Dorset.
I would advice you to choose a company that has a number of years experience an who know what they are doing, ensure they supply you with a certificate of testing at the end of the inspection, there are many companies based around the different parts of Dorset that offer this, including ones in Dorchester, Christchurch and Weymouth.
I always use a company I feel comfortable with, recently I called one PAT tester in Bournemouth and was very impressed with the detailed description he gave me of the job he would do, I have not used the service yet as the test date is not due for a couple of months, but after speaking with them on the phone I feel it is a company that has had some PAT testing training and they made me feel confident that they knew what they were doing.
I am sure there are a good number of companies offering PAT Testing in Dorset but it is good to use one you feel comfortable with.