Up until yesterday I had no problems with my landline. Now when it rings there is just static and when I try to place a call silence. I contacted BT and they did the landline check and said no problems. The phone is new this year and I have no problems at all with the internet. 
Try plugging the phone directly into the test socket, which is located behind the master socket. Just remove the two screws at the front.
Then ring your phone line from a mobile, and see if you still get the static.
If you still get the static, then you have a faulty phone line which you have proved out of your house.
Its also worth checking with another phone, just in case your phone has gone faulty.
You should not have a phone splitter plugged into that master phone socket, as its likely to cause problems.
@maggiel50 wrote:
Thanks I will give that a go when I get back from shopping. Unfortunately with regards the splitter I have no other option, I don't think, as that is the only Open Reach in the house and I need it for the internet.
No, its not the microfilter that needs to go, its the phone splitter, as shown in your picture, that should not be there. It looks like its possible to release it as there may be a clip underneath.
The microfilter should be plugged directly into the phone socket.
This is the microfilter, and it must be the only thing plugged into your phone socket.
The picture below, shows the best way to test.
