diff --git a/app/models/form/sales/pages/mortgage_length.rb b/app/models/form/sales/pages/mortgage_length.rb
index 55b286bd3..979369bdd 100644
--- a/app/models/form/sales/pages/mortgage_length.rb
+++ b/app/models/form/sales/pages/mortgage_length.rb
@@ -8,7 +8,6 @@ class Form::Sales::Pages::MortgageLength < ::Form::Page
 
   def questions
     @questions ||= [
-      Form::Sales::Questions::MortgageLengthKnown.new(nil, nil, self),
       Form::Sales::Questions::MortgageLength.new(nil, nil, self),
     ]
   end
diff --git a/app/models/form/sales/questions/buyer1_previous_tenure.rb b/app/models/form/sales/questions/buyer1_previous_tenure.rb
index d13c952cd..b41fbbabd 100644
--- a/app/models/form/sales/questions/buyer1_previous_tenure.rb
+++ b/app/models/form/sales/questions/buyer1_previous_tenure.rb
@@ -17,19 +17,5 @@ class Form::Sales::Questions::Buyer1PreviousTenure < ::Form::Question
     "6" => { "value" => "Living with family or friends" },
     "7" => { "value" => "Temporary accomodation" },
     "9" => { "value" => "Other" },
-    "0" => { "value" => "Don’t know" },
   }.freeze
-
-  def displayed_answer_options(_log, _user = nil)
-    {
-      "1" => { "value" => "Local Authority" },
-      "2" => { "value" => "Private registered provider or housing association tenant" },
-      "3" => { "value" => "Private tenant" },
-      "5" => { "value" => "Owner occupier" },
-      "4" => { "value" => "Tied home or renting with job" },
-      "6" => { "value" => "Living with family or friends" },
-      "7" => { "value" => "Temporary accomodation" },
-      "9" => { "value" => "Other" },
-    }
-  end
 end
diff --git a/app/models/form/sales/questions/mortgage_length.rb b/app/models/form/sales/questions/mortgage_length.rb
index 706b7d3ee..3f1603b75 100644
--- a/app/models/form/sales/questions/mortgage_length.rb
+++ b/app/models/form/sales/questions/mortgage_length.rb
@@ -10,9 +10,5 @@ class Form::Sales::Questions::MortgageLength < ::Form::Question
     @width = 5
     @suffix = " years"
     @hint_text = "You should round up to the nearest year. Value should not exceed 60 years."
-    @inferred_check_answers_value = [{
-      "condition" => { "mortlen_known" => 2 },
-      "value" => "Not known",
-    }]
   end
 end
diff --git a/app/models/form/sales/questions/mortgage_length_known.rb b/app/models/form/sales/questions/mortgage_length_known.rb
deleted file mode 100644
index af55eadc2..000000000
--- a/app/models/form/sales/questions/mortgage_length_known.rb
+++ /dev/null
@@ -1,28 +0,0 @@
-class Form::Sales::Questions::MortgageLengthKnown < ::Form::Question
-  def initialize(id, hsh, page)
-    super
-    @id = "mortlen_known"
-    @check_answer_label = "Mortgage length known"
-    @header = "Do you know the mortgage length?"
-    @type = "radio"
-    @answer_options = ANSWER_OPTIONS
-    @conditional_for = {
-      "mortlen" => [0],
-    }
-    @hidden_in_check_answers = {
-      "depends_on" => [
-        {
-          "mortlen_known" => 1,
-        },
-        {
-          "mortlen_known" => 2,
-        },
-      ],
-    }
-  end
-
-  ANSWER_OPTIONS = {
-    "1" => { "value" => "Yes" },
-    "2" => { "value" => "No" },
-  }.freeze
-end
diff --git a/app/services/imports/sales_logs_import_service.rb b/app/services/imports/sales_logs_import_service.rb
index a26267129..deea3fab6 100644
--- a/app/services/imports/sales_logs_import_service.rb
+++ b/app/services/imports/sales_logs_import_service.rb
@@ -118,7 +118,6 @@ module Imports
       attributes["mortgagelender"] = mortgage_lender(xml_doc, attributes)
       attributes["mortgagelenderother"] = mortgage_lender_other(xml_doc, attributes)
       attributes["mortlen"] = mortgage_length(xml_doc, attributes)
-      attributes["mortlen_known"] = 1 if attributes["mortlen"].present?
       attributes["extrabor"] = borrowing(xml_doc, attributes)
       attributes["totadult"] = safe_string_as_integer(xml_doc, "TOTADULT") # would get overridden
       attributes["totchild"] = safe_string_as_integer(xml_doc, "TOTCHILD") # would get overridden
@@ -405,7 +404,6 @@ module Imports
       attributes["hb"] ||= 4
       attributes["prevown"] ||= 3
       attributes["savingsnk"] ||= attributes["savings"].present? ? 0 : 1
-      attributes["mortlen_known"] ||= 2 if attributes["mortgage"].blank?
       # attributes["noint"] = 1 # not interviewed
 
       # buyer 1 characteristics
diff --git a/db/migrate/20230228112317_add_mortgage_length_known.rb b/db/migrate/20230228112317_add_mortgage_length_known.rb
deleted file mode 100644
index 7d2d8a0b2..000000000
--- a/db/migrate/20230228112317_add_mortgage_length_known.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-class AddMortgageLengthKnown < ActiveRecord::Migration[7.0]
-  def change
-    add_column :sales_logs, :mortlen_known, :integer
-  end
-end
diff --git a/db/schema.rb b/db/schema.rb
index be59aaf92..3bc97927c 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2023_02_28_112317) do
+ActiveRecord::Schema[7.0].define(version: 2023_02_15_112932) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
@@ -490,6 +490,7 @@ ActiveRecord::Schema[7.0].define(version: 2023_02_28_112317) do
     t.integer "prevten"
     t.integer "mortgageused"
     t.integer "wchair"
+    t.integer "income2_value_check"
     t.integer "armedforcesspouse"
     t.datetime "hodate", precision: nil
     t.integer "hoday"
@@ -525,13 +526,11 @@ ActiveRecord::Schema[7.0].define(version: 2023_02_28_112317) do
     t.integer "details_known_5"
     t.integer "details_known_6"
     t.integer "ethnic_group2"
+    t.integer "proplen_asked"
     t.integer "ethnicbuy2"
     t.integer "prevshared"
     t.integer "staircasesale"
     t.string "old_id"
-    t.integer "income2_value_check"
-    t.integer "proplen_asked"
-    t.integer "mortlen_known"
     t.index ["bulk_upload_id"], name: "index_sales_logs_on_bulk_upload_id"
     t.index ["created_by_id"], name: "index_sales_logs_on_created_by_id"
     t.index ["old_id"], name: "index_sales_logs_on_old_id", unique: true
diff --git a/spec/factories/sales_log.rb b/spec/factories/sales_log.rb
index 761a52c8a..f1da841a4 100644
--- a/spec/factories/sales_log.rb
+++ b/spec/factories/sales_log.rb
@@ -95,7 +95,6 @@ FactoryBot.define do
       armedforcesspouse { 5 }
       mscharge_known { 1 }
       mscharge { 100 }
-      mortlen_known { 1 }
       mortlen { 10 }
       pcodenk { 1 }
       is_la_inferred { false }
diff --git a/spec/models/form/sales/pages/mortgage_length_spec.rb b/spec/models/form/sales/pages/mortgage_length_spec.rb
index 394ec94ab..ef2573e57 100644
--- a/spec/models/form/sales/pages/mortgage_length_spec.rb
+++ b/spec/models/form/sales/pages/mortgage_length_spec.rb
@@ -12,7 +12,7 @@ RSpec.describe Form::Sales::Pages::MortgageLength, type: :model do
   end
 
   it "has correct questions" do
-    expect(page.questions.map(&:id)).to eq(%w[mortlen_known mortlen])
+    expect(page.questions.map(&:id)).to eq(%w[mortlen])
   end
 
   it "has the correct id" do
diff --git a/spec/models/form/sales/questions/buyer1_previous_tenure_spec.rb b/spec/models/form/sales/questions/buyer1_previous_tenure_spec.rb
index 4a0a86dba..a63b695a5 100644
--- a/spec/models/form/sales/questions/buyer1_previous_tenure_spec.rb
+++ b/spec/models/form/sales/questions/buyer1_previous_tenure_spec.rb
@@ -42,20 +42,6 @@ RSpec.describe Form::Sales::Questions::Buyer1PreviousTenure, type: :model do
       "6" => { "value" => "Living with family or friends" },
       "7" => { "value" => "Temporary accomodation" },
       "9" => { "value" => "Other" },
-      "0" => { "value" => "Don’t know" },
-    })
-  end
-
-  it "has the correct displayed_answer_options" do
-    expect(question.displayed_answer_options(log)).to eq({
-      "1" => { "value" => "Local Authority" },
-      "2" => { "value" => "Private registered provider or housing association tenant" },
-      "3" => { "value" => "Private tenant" },
-      "4" => { "value" => "Tied home or renting with job" },
-      "5" => { "value" => "Owner occupier" },
-      "6" => { "value" => "Living with family or friends" },
-      "7" => { "value" => "Temporary accomodation" },
-      "9" => { "value" => "Other" },
     })
   end
 end
diff --git a/spec/models/form/sales/questions/mortgage_length_known_spec.rb b/spec/models/form/sales/questions/mortgage_length_known_spec.rb
deleted file mode 100644
index edf43a918..000000000
--- a/spec/models/form/sales/questions/mortgage_length_known_spec.rb
+++ /dev/null
@@ -1,57 +0,0 @@
-require "rails_helper"
-
-RSpec.describe Form::Sales::Questions::MortgageLengthKnown, type: :model do
-  subject(:question) { described_class.new(question_id, question_definition, page) }
-
-  let(:question_id) { nil }
-  let(:question_definition) { nil }
-  let(:page) { instance_double(Form::Page) }
-
-  it "has correct page" do
-    expect(question.page).to eq(page)
-  end
-
-  it "has the correct id" do
-    expect(question.id).to eq("mortlen_known")
-  end
-
-  it "has the correct header" do
-    expect(question.header).to eq("Do you know the mortgage length?")
-  end
-
-  it "has the correct check_answer_label" do
-    expect(question.check_answer_label).to eq("Mortgage length known")
-  end
-
-  it "has the correct type" do
-    expect(question.type).to eq("radio")
-  end
-
-  it "is not marked as derived" do
-    expect(question.derived?).to be false
-  end
-
-  it "has the correct answer_options" do
-    expect(question.answer_options).to eq({
-      "1" => { "value" => "Yes" },
-      "2" => { "value" => "No" },
-    })
-  end
-
-  it "has correct conditional for" do
-    expect(question.conditional_for).to eq({
-      "mortlen" => [0],
-    })
-  end
-
-  it "has correct hidden in check answers" do
-    expect(question.hidden_in_check_answers).to eq({
-      "depends_on" => [{
-        "mortlen_known" => 1,
-      },
-                       {
-                         "mortlen_known" => 2,
-                       }],
-    })
-  end
-end