There are remains of an Z8260 at Uckfield in East Sussex, the bowl and lamp have long gone but the canopy and coulmn remain in NSE colours. There is also a handful left at Selhurst rail depot which are being replaced by ZX3's.

I'm not sure if Portmadog station has any Z8260's left, but I imagine so.

I only saw porthmadog station from the level crossing so I can't really remember for sure. Don't think I saw any though, because if I had done then I'd have made a mental note.
A lot of stations in the north of Wales seem to use Phillips SGS202/3's... Even Blaneau Ffestiniog which is shared with a narrowgauge railway (strange station layout)