i was messing about the other day in photoshop and found a whole load of classic camera and lens styles/effects that you could apply to a pic.

just spent an hour looking for it again and can’t find it.

does that make sense to anyone and if so where is it?

Try Filter, then select render from the drop down.

Lens flare, Lighting effect etc

From the top bar:
Image > adjustments > photo filter?

No idea what you mean by classic camera but it sounds like you may have a crappy plugin installed and if so look under styles or filters.

Yeah, it sounds like it might be a third party plugin. Have a look at the bottom of the filters menu.