anchor.diff:      <div class="form-group">
         <%= f.label :date_of_appointment %>
         <%= f.date_field :date_of_appointment,
  -                       class: %w(form-control input-md-2 t-date-of-appointment) %>
  +                       class: %w(form-control input-md-2 t-date-of-appointment), readonly: true %>
       </div>
   
       <div class="form-group">
         <%= f.label :reference_number %>
  -      <%= f.text_field :reference_number, class: %w(form-control input-md-2 t-reference-number) %>
  +      <%= f.text_field :reference_number, class: %w(form-control input-md-2 t-reference-number), readonly: true %>
       </div>
   
       <div class="form-group">
  
positive.code:         <div class="radio">
            <%= f.label :appointment_type, value: 'standard' do %>
              <%= f.radio_button :appointment_type, 'standard',
                                 class: 't-appointment-type-standard' %>
              Appointment for customers aged 55+
            <% end %>
          </div>
          <div class="radio">
            <%= f.label :appointment_type, value: '50_54' do %>
              <%= f.radio_button :appointment_type, '50_54',
                                 class: 't-appointment-type-50-54' %>
              Appointment for customers aged 50-54
            <% end %>
          </div>
  
negative.code: 
      <div class="form-group">
        <%= f.label :guider_name %>
        <%= f.text_field :guider_name, class: %w(form-control input-md-3 t-guider-name), readonly: true %>
      </div>
  
      <hr>
  