On 09/06/2019 13:10, Jim GM4DHJ ... wrote:
Just noticed I have lost all the horizontal channels on both satellite
rxs

Change the LNB


.......is it as simple as a duff lnb

Yes


or coupled with the fact I am getting
a shock off the outer of all the f connectors could it be a cable/plug fault

That's AC leakage in the receiver. Normal.

Bill