How do I find out who is the biggest horse in the National?

Take a tape measure.

have a look at them,
ballabriggs is a beast,get on

with great difficulty

THINK YOULL STRUGGLE, THEIR ALL GELDINGS, HOWEVER GET CLAIR BALDING IN A BASQUE N STOCKINGS RUNNING AROUND THE PARADE THERE MAY BE 1 OR TWO TAKERS, FAILING THAT GET WILLIE TO FLEX HIS GUMS....

big fella thanks sounds a possibility-