After putting the mains back on, the pressure to the kitchen sink was extremely low while the rest of the house is fine. I then turned it off and on again and have no water coming out the kitchen sink.
As a solution I tried attaching a water pressure pump to the kitchen sink cold side and leaving the lead pipe exposed as a release point and no water comes out. The pressure seems to hold as if the potential blockage is a perfect seal.
Now I have no idea on how to fix this please help