You need a leakage meter then to determine what kind of current is
actually present. Simply connecting a standard current meter is a bad
idea as those have little internal resistance and if the tv is
supplying high current, then something will be damaged.

It may be within manufacturing specifications as none of your measured
voltages were high enough for a full isolation failure.
It is not the voltage that is of concern, but the leakage current. You
meter was only placing a few megaohms load between the scart ground and
mains ground.

On a 120V typical hot chassis power suuply, the voltage measured to
ground would be around 85 volts and will have sufficient current to
easily light a 40watt incandescent light bulb when connected between
the offending hot chassis and ground.

I would bet that there is only a few uA of leakage current present out
of the tv scart connector given the voltages measured across a few
megaohm .

You did not mention what was measured on the community arial connector
to earth/mains ground. Given what you measured on your scart
connector, I am betting on a problem on the ariel line coming in, not
your tv set.