Unfortunately I am in the US so can't check UK stores. 
  
I would be using the 2 cameras to ID vandals at 20 - 50 ft at night with minimum ambient light so low light / infrared capability and sharp image are important although color and sound are not.   
  
That said I don't have the budget for commercial grade equipment.   I am hoping to do it myself for as little money as possible. 
  
In that regard, should I be looking at wifi IP cameras or wifi analog (CCTV?) models? 
  
If your answer is wifi IP cameras, does that mean I only need the cameras, a wifi router, a computer and camera monitoring software? 
  
I am a little confused about the requisite hardware re: IP vs. analog systems... 
  
Thnx in advance... 
  
d