Thanks to everyone for your input and advice so far!
The tradesman has offered to correct and asked for a list of my concerns. Having checked the original quote and agreement I have sent:
1. Guttering fall/drop is incorrect and water is not draining correctly.
2. Downpipes have not been fitted with an end elbow
3. Rotten fascia boards appear to have been capped rather than removed and replaced.
4. Soffit boards have been cut unevenly and do not meet the fascia groovecorrectly, leaving exposed timber in places.
5. Sections of soffit and fascia are not level.
6. A drip edge has not been installed.
7. Some cuts and joints are uneven and require replacement.
In order to rectify the above, I believe the affected sections of fascia, soffit and guttering will likely need to be removed and reinstalled correctly rather than patched or adjusted.
Can anyone here see any issues which u have missed?