https://locksandhardware.co.uk/security-ironmongery/door-viewers/
Door Viewers | Security Door Peepholes & Viewports
Buy door viewers and security peepholes for enhanced door visibility. Wide-angle viewports for improved safety by letting you see who’s outside before opening.
door viewerssecuritypeepholesviewports
https://www.frelanhardware.co.uk/ProductGrp/180-degree-door-viewers-to-fit-35-55mm-doors_1
Jedo 180 Degree Door Viewers to Fit 35-55mm Doors | Frelan Hardware
Add security and peace of mind to your home with our door viewer. This product features a wide 200-degree viewing angle and is available in multiple finishes.
door viewers