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.



FCA framework for firms on assessing adequate financial resources
Alistair MacDougall Compliance FCA
The FCA has published final guidance on a framework to help financial services firms ensure they have adequate financial resources and to take effective steps to minimise harm.