anchor.diff:  
       <div class="form-group">
         <%= f.label :guider_name %>
  -      <%= f.text_field :guider_name, class: %w(form-control input-md-3 t-guider-name) %>
  +      <%= f.text_field :guider_name, class: %w(form-control input-md-3 t-guider-name), readonly: true %>
       </div>
   
       <hr>
  
positive.code: 
      <div class="form-group">
        <%= f.label :first_name %>
        <%= f.text_field :first_name, class: %w(form-control input-md-3 t-first-name) %>
      </div>
  
      <div class="form-group">
        <%= f.label :last_name %>
        <%= f.text_field :last_name, class: %w(form-control input-md-3 t-last-name) %>
      </div>
  
      <div class="form-group">
        <%= f.label :email %>
        <%= f.text_field :email, class: %w(form-control t-email input-md-3) %>
      </div>
  
      <h3 id="postal-address-heading">Postal address</h3>
  
negative.code:     <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), 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), readonly: true %>
      </div>
  
      <div class="form-group">
  