Morris Minor Owners Club

Hi all
I have a slight problem with my fuel gauge
turn on ign and no movement turn off ign and it flicks to half way and then to empty
the speedo and gauge are 'gold' type
every thing esle seems to work ie lights horn wipers etc
poss sender fault?

Sure it's not just a loose connection to the gauge (behind the speedo), being breifly engaged by the off motion of the key?