Fitting spyhole to PVC door.

[slapdash]

I'd like to fit a spyhole viewer to a shiny new PVC door. Can I just drill a hole through the middle of the door?
I'm presuming it's a steel frame but can anyone advise me if I'm likely to come across a steel plate in the middle of the door?
If the doorskin is just plastic - rather than plastic coated steel - can I draw the spyhole tight enough without distorting the door?
Anyone done this before?

[TheIronmonger]

No no and no you shouldnt drill a UPVC door it will compromise the intergraty of the door also you will need at least 30-40mm door thickness for a door viewer and you wont have that on UPVC.
You can buy a cheap battery operated camera type door viewer that you can glue to the outside of the door if you need to.