I'd just make a few small comments.
It is important to remember that as auditors we cannot audit your food safety culture. What we can audit is your action plan and any reviews. Culture is day to day, it is not something we can review in a single day audit.
Ensuring your staff complete a questionnaire is an activity, so make sure that is documented as an activity on your action plan. Not only is it a defined activity, but it can also feed into the "review of the effectiveness of completed activities". Remember to make sure the survey is completely anonymous and some good questions to ask include "If a friend or family member needed a job, would you recommend they work here"?
Your action plan does not need to be war and peace. If you a small agent and broker it would be perfectly reasonable to have 3 actions, those being the completion of the staff survey, the food safety training for all staff on induction and a discussion in weekly meetings.
A few other examples of objectives you could set:
- All staff to be involved in the setting of company objectives (clause 1.1.3) via an all company team meeting.
- Additional training implemented for sales staff to be able to carry out internal audits is a really good idea (as Konstantinos said above)
- Additional staff to receive role specific BRCGS training.
Don't feel like your action plan only needs to run on a year by year basis. It is perfectly reasonable to have a plan with some activities that lasts 3 years or 5 years.
Final comment, just because your staff survey showed their were no issues, doesn't mean there are no issues or that your food safety culture is as good as it could be. Like with internal audits where a site finds nothing wrong every year and yet there are issues we find during the audit, those types of questionnaires tend to get challenged to determine how effective they really were. So you may decide that an action is to review and update your staff survey with additional questions or clarifications in wording.