Discuss the sequence with the people doing the wall, gate and fence work. If a cable route, connection or mounting point will be covered, ask the relevant contractor what needs inspection before it is concealed. Do not remove plaster or open electrical equipment yourself to help; explain the access problem and let the professionals agree the next step.
At the end of the project, request a clear account of the fence work completed and any remaining items. Keep it with the earlier certificate and alteration information. If the property is occupied throughout the work, make arrangements to keep children, visitors and animals clear of the work area. Temporary access arrangements should be agreed for the site rather than assumed from a suburb name.