Need repair for faulty toilet flush mechanism

I'm looking for a skilled handyman to diagnose and repair a faulty toilet flush in my home. The issue started recently with the flush not finishing properly and occasionally running after flushing. I suspect a worn flapper, fill valve, or float adjustment may be needed. Ideally, you would bring basic tools, have experience with standard mains toilets, and be able to confirm the exact part required before proceeding. Please provide an estimate of parts (if any) and a rough labour time. Flexible on weekdays, but aiming for a weekend appointment if possible. Location is in the local area and access is straightforward.