Hi team, tell me if this is wrong place to ask but I think it is kindof mechanical...

Working out the kinks on my new (to me) 92 SWB Safari Kingsroad (facelift model, leather seats etc)
I have front light wipers and the left one leaks at the wiper head, to the point of emptying out the wiper water tank.

Any ideas of a fix or am I looking at a new (old) wiper head unit?

Cheers
Dave T