UPVC front door - can I change the glass? If not how much to replace door?

[FrancoisOnTheMove]

Is it possible to replace the glass in this front door with clear? If not how much would it cost to replace with a more contemporary looking door?

Get a local glazier round to take a look. Usually with upvc there's beading on the inside which can be removed, then the glass can be taken out and replaced. I can't tell from your photos if that's the case with your door.

Blown double glazing units can be replaced without replacing the whole window - the glazier just has to measure up and their supplier will make the glass unit to fit.