A previous fixing position may be convenient but still unsuitable for the new item or its hanging system. Show any damaged wall finish around it. Filling old holes and repainting are separate tasks that should be specified in the enquiry.
Masonry, plasterboard and other surfaces need different fixing assessments. Share what is known about the wall and nearby services. Existing holes do not establish suitable support for a heavier object, and unknown construction can require further review before installation.
A mirror can be heavier than its appearance suggests. Provide weight information and a photograph of its rear hanging system. The wall fixing and the fittings on the frame must both suit the load; neither should be judged from the front view alone.
The agreed service covers layout, hanging-system and substrate review, compatible fixings for assessed loads. Exclusions: Glass cutting, frameless glazing, conservation handling, oversized unsupported loads, electrical work.