The Abbey National seem to have liked using big name comedy stars to advertise their services through the years. The memorable one from the 90s would be this, I suspect.
But they also employed Richard Wilson around that time, playing up on the character of Victor Meldrew.
https://youtu.be/tCkPmmzEU1I
And also David Jason some time around 1988.
https://youtu.be/mtn6qkvVl_w
As well as Lenny Henry, as Delbert Wilkins, at a similar time.
https://youtu.be/0QBhDVjV6Pk