Expertise Required for Commercial CCTV Setup

I need 1–4 high-resolution CCTV cameras professionally fitted in my commercial premises, with coverage split between indoor customer areas and the outdoor entrance/loading zone. The space already has power and basic network points available; however, no cabling or mounts for cameras exist yet... (Budget: £100 - £125 GBP, Jobs: CCTV, Electrical Engineering, Home Automation, Installation, Network Security, Security, Security Auditing, Security Systems, Surveillance, Technical Support)