There are 12% people faces social anxiety during their lifetime which is equal to 8 million people in the UK.
Within a 12 month period over 2% people in the UK are likely to face Social Anxiety

Source:
Social Anxiety Alliance UK with the data from
National Institute of Mental Health
The words and language are changed from the original information to avoid inflicting negative stigma

Around 6 in 100 people (6%) of people in the UK will be diagnosed with generalised Anxiety
Source:
Champion Health with data from Mind
The words and language are changed from the original information to avoid inflicting negative stigma

1 in 4 people   will experience
mental health problems on any given year.
9 out of 10 people with mental health
problems face stigma & discrimination
People with mental illness are more likely be a victim of violence.
1 in 10 young   people experience   mental health problem

Source:
Time to change website

Four in ten managers believe
 it is a risk to recruit people with mental health conditions
to a job deadline with the public or clients

nearly 1 in 4 managers are unable to name a single mental illnesses

In a poll, one in four companies think people with mental health are less reliable than other employees.

Sources:
Some are featured on a news article from The Independent from a
2010 survey from the Shaw Trust towards 500 business
The other example from a poll in 2010 by Trajectory from the independent newspaper

It is estimated that 1 in   6 people   adults   in England experienced a common mental health problem

1 in 6 people in Britain are suffering from mental health condition such as depression, dipolar disorder, panic attacks or anxiety at any given time
Mixed Anxiety & depression is the most common mental disorder in Britain with 7.8% of people meeting criteria for diagnosis

Sources:
Mental Health Foundation, Mind and a 2016 NHS publication "Mental Health and well being in England"