Thanks Tomcctv,
I had a chat with Flir about the system you suggested, that starts at €118,500 way over my budget. The closets to my requirements in the Flir range is the PT-602CZ priced at 30k still way too much.
Looking around I found the PTZ-6000 at 21k still over my budget.
The closest I have found to my requirements is the Bosh MIC-550CLW36P IP.
Reviewing the spec after discussing the specifications for the camera in-house we have decided to up the budget to around 10k Euro and reduce the range to 5 km.
I would prefer the camera to have functionality in reduced visibility conditions such a low light, heavy rain and fog.
I would be grateful for any recommendations.