UK CAA Class 3 Medical with prior Social Anxiety

Hi,

I need to secure a class 3 medical certificate prior to joining NATS as a Trainee Air Traffic Controller.

Unfortunately, I visited the GP once around 5 years ago and was diagnosed with social anxiety for which I did a round of Cognitive Behavioral Therapy (CBT) i.e. talk therapy.

How much of an issue do you think this is likely going to present? Has anyone else had any problems with similar stuff on their medical records?