I have a new wing mirror indicator lens to replace a broken on driver side. is it easy to replace? if so, can anyone help with advice how to do it. I have a 59 plate fiat ducato motorhome.

There is a video on YouTube on how to do it. Just search Ducato wing mirror replacement.

Very easy. Push the mirror in at the edge close to the indicator. This should allow access to two screw heads which allow removal of the complete indicator assembly.