There is a specific rule requirement to disclose any possible disadvantages in the suitability report. The rule (COBS 9.4.7) can be seen here: http://fshandbook.info/FS/html/FCA/COBS/9/4.
Remember that a disadvantage is different to a risk. For example, there is a risk that investments can fall in value, whereas a disadvantage would be that the recommended product has higher charges than the product being replaced.



BREXIT latest FCA position statement
Alistair MacDougall Compliance 2019, 2020, FCA, GDPR, Pension, PI
Given recent changes in the UK’s position on BREXIT, the FCA has updated its guidance.