Thanks all for your help! In the recent snow its been a bit of a pain not being able to see!

Both arms are stopping

The noise sounds like its coming from the arm on the passenger side, not the footwell.

Its a 1989 90 19j

my 90's front wipers get stuck half way up the windscreen and a loud clicking starts, the only way to get the wipers to move is to push them up where by they return back to the start of the cycle but the issue then starts again. A novice to all this so any tips would be appreciated. Thanks James