diff --git a/app/models/press_summary.rb b/app/models/press_summary.rb
index dc969eb29..da41e61ff 100644
--- a/app/models/press_summary.rb
+++ b/app/models/press_summary.rb
@@ -3,11 +3,16 @@ class PressSummary < ApplicationRecord
 
   validates :form_answer, :token, presence: true
   validates :body, presence: true, unless: :contact_details_update?
-  validates :name, :email, :phone_number,
+  validates :name, :email,
     presence: true,
     unless: proc { |c| c.body_update.present? },
     if: :applicant_submitted?
 
+  validates :phone_number,
+    phone: true,
+    unless: proc { |c| c.body_update.present? },
+    if: :applicant_submitted?
+
   validates :title, :last_name,
     presence: true,
     unless: proc { |c| c.body_update.present? && form_answer.award_year.year >= 2020 },
diff --git a/config/locales/en.yml b/config/locales/en.yml
index b6c30030f..edf92aa3c 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -81,6 +81,10 @@ en:
           attributes:
             phone_number:
               invalid: Enter a phone number, like 01635 960 001, 07701 900 982 or +44 808 157 0192
+        press_summary:
+          attributes:
+            phone_number:
+              invalid: Enter a phone number, like 01635 960 001, 07701 900 982 or +44 808 157 0192
         user:
           attributes:
             phone_number: