You have some legal protection from victimisation. Any employees or workers who are victimised for taking up a health and safety issue at work, whether they do so on their own account or as recognised safety representatives, are protected under the Public Interest Disclosure Act (PIDA) 1998.
In addition, sections 44 and 100 of the Employment Rights Act 1996 say that no employee should suffer a detriment or be made redundant for:
You can enforce these rights from Day 1 of your employment. Whereas rights under the Public Interest Disclosure Act are available to both employees and workers, the rights provided by the Employment Rights Act 1996 set out above are available only to employees.