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.



Mortgage Credit Directive Changes
Steve Bailey Compliance 2016, 2017, 2018, 2019, FCA, Mortgage, PI, Xplan
New regulation affecting firms arranging or advising on mortgages.